From 4bf332c785bc14e6decb6ea4949a831e7e199b8b Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 6 Feb 2014 16:50:34 +0100 Subject: [PATCH 01/22] mac80211: remove superfluous band variable We already have a band variable, so the new one is just shadowing it, but the existing one already holds the same value so just remove the inner one. Signed-off-by: Johannes Berg --- net/mac80211/cfg.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 6973ccdd230b..7f01f2aec7b5 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1345,9 +1345,6 @@ static int sta_apply_parameters(struct ieee80211_local *local, params->vht_capa, sta); if (params->opmode_notif_used) { - enum ieee80211_band band = - ieee80211_get_sdata_band(sdata); - /* returned value is only needed for rc update, but the * rc isn't initialized here yet, so ignore it */ From b59ec8dd4394cf11e3253e849a04734be6d3d694 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 7 Feb 2014 10:44:50 +0100 Subject: [PATCH 02/22] mac80211_hwsim: fix number of channels in interface combinations There's little point in setting the number of channels if the entire combination struct is overwritten again later - that was clearly intended the other way around, fix it. Reported-by: Luciano Coelho Signed-off-by: Johannes Berg --- drivers/net/wireless/mac80211_hwsim.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index f7e3562542fe..771b8c573bff 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -2004,11 +2004,11 @@ static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2, /* For channels > 1 DFS is not allowed */ hw->wiphy->n_iface_combinations = 1; hw->wiphy->iface_combinations = &data->if_combination; - data->if_combination.num_different_channels = data->channels; if (p2p_device) data->if_combination = hwsim_if_comb_p2p_dev[0]; else data->if_combination = hwsim_if_comb[0]; + data->if_combination.num_different_channels = data->channels; } else if (p2p_device) { hw->wiphy->iface_combinations = hwsim_if_comb_p2p_dev; hw->wiphy->n_iface_combinations = From 448cd2e248732326632957e52ea9c44729affcb2 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Tue, 11 Feb 2014 12:30:18 +0200 Subject: [PATCH 03/22] mac80211: reset probe_send_count also in HW_CONNECTION_MONITOR case In case of beacon_loss with IEEE80211_HW_CONNECTION_MONITOR device, mac80211 probes the ap (and disconnects on timeout) but ignores the ack. If we already got an ack, there's no reason to continue disconnecting. this can help devices that supports IEEE80211_HW_CONNECTION_MONITOR only partially (e.g. take care of keep alives, but does not probe the ap. In case the device wants to disconnect without probing, it can just call ieee80211_connection_loss. Signed-off-by: Eliad Peller Signed-off-by: Johannes Berg --- include/net/mac80211.h | 2 -- net/mac80211/mlme.c | 4 ++-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 4f0f29dce0aa..4005c5b4e3b4 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1507,8 +1507,6 @@ struct ieee80211_tx_control { * @IEEE80211_HW_CONNECTION_MONITOR: * The hardware performs its own connection monitoring, including * periodic keep-alives to the AP and probing the AP on beacon loss. - * When this flag is set, signaling beacon-loss will cause an immediate - * change to disassociated state. * * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: * This device needs to get data from beacon before association (i.e. diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 61604834b914..b9432b575444 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -131,13 +131,13 @@ void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) if (unlikely(!sdata->u.mgd.associated)) return; + ifmgd->probe_send_count = 0; + if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR) return; mod_timer(&sdata->u.mgd.conn_mon_timer, round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); - - ifmgd->probe_send_count = 0; } static int ecw2cw(int ecw) From 802ee9ecfc886c5d6ad831586e65088893c774fb Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Tue, 11 Feb 2014 12:36:18 +0200 Subject: [PATCH 04/22] mac80211: add beacon_loss debugfs file Add beacon_loss debugfs file that emulates ieee80211_beacon_loss call from the driver. This can be used for various testing scenarios. Signed-off-by: Eliad Peller Signed-off-by: Johannes Berg --- net/mac80211/debugfs_netdev.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c index ebf80f3abd83..40a648938985 100644 --- a/net/mac80211/debugfs_netdev.c +++ b/net/mac80211/debugfs_netdev.c @@ -358,6 +358,18 @@ static ssize_t ieee80211_if_parse_tkip_mic_test( } IEEE80211_IF_FILE_W(tkip_mic_test); +static ssize_t ieee80211_if_parse_beacon_loss( + struct ieee80211_sub_if_data *sdata, const char *buf, int buflen) +{ + if (!ieee80211_sdata_running(sdata) || !sdata->vif.bss_conf.assoc) + return -ENOTCONN; + + ieee80211_beacon_loss(&sdata->vif); + + return buflen; +} +IEEE80211_IF_FILE_W(beacon_loss); + static ssize_t ieee80211_if_fmt_uapsd_queues( const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) { @@ -569,6 +581,7 @@ static void add_sta_files(struct ieee80211_sub_if_data *sdata) DEBUGFS_ADD(beacon_timeout); DEBUGFS_ADD_MODE(smps, 0600); DEBUGFS_ADD_MODE(tkip_mic_test, 0200); + DEBUGFS_ADD_MODE(beacon_loss, 0200); DEBUGFS_ADD_MODE(uapsd_queues, 0600); DEBUGFS_ADD_MODE(uapsd_max_sp_len, 0600); } From e4dcbb375cd829e1649b12e0ab7d7e5b7efcb5a5 Mon Sep 17 00:00:00 2001 From: David Spinadel Date: Tue, 11 Feb 2014 13:45:41 +0200 Subject: [PATCH 05/22] mac80211: fix IE buffer len Remove size of SSID IE from the IE buffer in scan and sched scan, since this IE isn't added to this buffer. Reviewed-by: Eliad Peller Reviewed-by: Emmanuel Grumbach Reviewed-by: Alexander Bondar Signed-off-by: David Spinadel Signed-off-by: Johannes Berg --- net/mac80211/scan.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 88c81616f8f7..b211e412511f 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -472,9 +472,7 @@ static int __ieee80211_start_scan(struct ieee80211_sub_if_data *sdata, if (local->ops->hw_scan) { u8 *ies; - local->hw_scan_ies_bufsize = 2 + IEEE80211_MAX_SSID_LEN + - local->scan_ies_len + - req->ie_len; + local->hw_scan_ies_bufsize = local->scan_ies_len + req->ie_len; local->hw_scan_req = kmalloc( sizeof(*local->hw_scan_req) + req->n_channels * sizeof(req->channels[0]) + @@ -979,8 +977,7 @@ int __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata, struct cfg80211_chan_def chandef; int ret, i, iebufsz; - iebufsz = 2 + IEEE80211_MAX_SSID_LEN + - local->scan_ies_len + req->ie_len; + iebufsz = local->scan_ies_len + req->ie_len; lockdep_assert_held(&local->mtx); From 361c3e0485c737b9c8a2d456b8c3c7b08d8ca8ee Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Mon, 10 Feb 2014 15:23:03 +0200 Subject: [PATCH 06/22] mac80211_hwsim: allow creation of single-channel radios with chanctx Add a new HWSIM_ATTR_USE_CHANCTX attribute to the HWSIM_CMD_CREATE_RADIO command to allow the creation of radios with one channel that use channel contexts. If this attribute is not present, the behaviour is the same as before (ie. single channel radios don't use channel contexts and multi channel radios do). Signed-off-by: Luciano Coelho Signed-off-by: Johannes Berg --- drivers/net/wireless/mac80211_hwsim.c | 29 +++++++++++++++++++-------- drivers/net/wireless/mac80211_hwsim.h | 4 ++++ 2 files changed, 25 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index 771b8c573bff..9d7a52f5a410 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -411,6 +411,7 @@ struct mac80211_hwsim_data { struct mac_address addresses[2]; int channels, idx; + bool use_chanctx; struct ieee80211_channel *tmp_chan; struct delayed_work roc_done; @@ -1088,7 +1089,7 @@ static void mac80211_hwsim_tx(struct ieee80211_hw *hw, return; } - if (data->channels == 1) { + if (!data->use_chanctx) { channel = data->channel; } else if (txi->hw_queue == 4) { channel = data->tmp_chan; @@ -1354,7 +1355,7 @@ static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed) data->channel = conf->chandef.chan; - WARN_ON(data->channel && data->channels > 1); + WARN_ON(data->channel && data->use_chanctx); data->power_level = conf->power_level; if (!data->started || !data->beacon_int) @@ -1940,7 +1941,8 @@ static struct ieee80211_ops mac80211_hwsim_mchan_ops; static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2, const struct ieee80211_regdomain *regd, - bool reg_strict, bool p2p_device) + bool reg_strict, bool p2p_device, + bool use_chanctx) { int err; u8 addr[ETH_ALEN]; @@ -1950,11 +1952,14 @@ static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2, const struct ieee80211_ops *ops = &mac80211_hwsim_ops; int idx; + if (WARN_ON(channels > 1 && !use_chanctx)) + return -EINVAL; + spin_lock_bh(&hwsim_radio_lock); idx = hwsim_radio_idx++; spin_unlock_bh(&hwsim_radio_lock); - if (channels > 1) + if (use_chanctx) ops = &mac80211_hwsim_mchan_ops; hw = ieee80211_alloc_hw(sizeof(*data), ops); if (!hw) { @@ -1995,9 +2000,10 @@ static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2, hw->wiphy->addresses = data->addresses; data->channels = channels; + data->use_chanctx = use_chanctx; data->idx = idx; - if (data->channels > 1) { + if (data->use_chanctx) { hw->wiphy->max_scan_ssids = 255; hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; hw->wiphy->max_remain_on_channel_duration = 1000; @@ -2156,7 +2162,7 @@ static int mac80211_hwsim_create_radio(int channels, const char *reg_alpha2, debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps); debugfs_create_file("group", 0666, data->debugfs, data, &hwsim_fops_group); - if (data->channels == 1) + if (!data->use_chanctx) debugfs_create_file("dfs_simulate_radar", 0222, data->debugfs, data, &hwsim_simulate_radar); @@ -2423,10 +2429,16 @@ static int hwsim_create_radio_nl(struct sk_buff *msg, struct genl_info *info) const struct ieee80211_regdomain *regd = NULL; bool reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG]; bool p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE]; + bool use_chanctx; if (info->attrs[HWSIM_ATTR_CHANNELS]) chans = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]); + if (info->attrs[HWSIM_ATTR_USE_CHANCTX]) + use_chanctx = true; + else + use_chanctx = (chans > 1); + if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]) alpha2 = nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]); @@ -2439,7 +2451,7 @@ static int hwsim_create_radio_nl(struct sk_buff *msg, struct genl_info *info) } return mac80211_hwsim_create_radio(chans, alpha2, regd, reg_strict, - p2p_device); + p2p_device, use_chanctx); } static int hwsim_destroy_radio_nl(struct sk_buff *msg, struct genl_info *info) @@ -2658,7 +2670,8 @@ static int __init init_mac80211_hwsim(void) err = mac80211_hwsim_create_radio(channels, reg_alpha2, regd, reg_strict, - support_p2p_device); + support_p2p_device, + channels > 1); if (err < 0) goto out_free_radios; } diff --git a/drivers/net/wireless/mac80211_hwsim.h b/drivers/net/wireless/mac80211_hwsim.h index 6e72996ec8c1..c9d0315575ba 100644 --- a/drivers/net/wireless/mac80211_hwsim.h +++ b/drivers/net/wireless/mac80211_hwsim.h @@ -108,6 +108,9 @@ enum { * @HWSIM_ATTR_REG_CUSTOM_REG: custom regulatory domain index (u32 attribute) * @HWSIM_ATTR_REG_STRICT_REG: request REGULATORY_STRICT_REG (flag attribute) * @HWSIM_ATTR_SUPPORT_P2P_DEVICE: support P2P Device virtual interface (flag) + * @HWSIM_ATTR_USE_CHANCTX: used with the %HWSIM_CMD_CREATE_RADIO + * command to force use of channel contexts even when only a + * single channel is supported * @__HWSIM_ATTR_MAX: enum limit */ @@ -128,6 +131,7 @@ enum { HWSIM_ATTR_REG_CUSTOM_REG, HWSIM_ATTR_REG_STRICT_REG, HWSIM_ATTR_SUPPORT_P2P_DEVICE, + HWSIM_ATTR_USE_CHANCTX, __HWSIM_ATTR_MAX, }; #define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1) From 1d5e1266cf4d96660e9b01577fdf8046b076cb58 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 12 Feb 2014 11:29:32 +0100 Subject: [PATCH 07/22] mac80211: simplify roc check in idle calculation There's no need to start iterating the list only to break on the first item, just use !list_empty() and also simplify the whole conditional into a single expression. Signed-off-by: Johannes Berg --- net/mac80211/iface.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 8880bc8fce0d..9db71cf7a665 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -101,9 +101,8 @@ static u32 __ieee80211_idle_on(struct ieee80211_local *local) static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, bool force_active) { - bool working = false, scanning, active; + bool working, scanning, active; unsigned int led_trig_start = 0, led_trig_stop = 0; - struct ieee80211_roc_work *roc; lockdep_assert_held(&local->mtx); @@ -111,12 +110,8 @@ static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, !list_empty(&local->chanctx_list) || local->monitors; - if (!local->ops->remain_on_channel) { - list_for_each_entry(roc, &local->roc_list, list) { - working = true; - break; - } - } + working = !local->ops->remain_on_channel && + !list_empty(&local->roc_list); scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning); From dfa1ad299184abeb8fea170e65727e263ac236a5 Mon Sep 17 00:00:00 2001 From: Calvin Owens Date: Tue, 11 Feb 2014 12:36:24 -0600 Subject: [PATCH 08/22] ieee80211: Print human-readable disassoc/deauth reason codes Create a function to return a descriptive string for each reason code, and print that in addition to the numeric value in the kernel log. These codes are easily found on popular search engines, but one is generally not able to access the internet when dealing with wireless connectivity issues. Signed-off-by: Calvin Owens [use 'unknown' rather than 'invalid' since more valid codes exist] Signed-off-by: Johannes Berg --- net/mac80211/mlme.c | 68 +++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 62 insertions(+), 6 deletions(-) diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index b9432b575444..46b62bb3677c 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2249,6 +2249,62 @@ static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, /* ignore frame -- wait for timeout */ } +#define case_WLAN(type) \ + case WLAN_REASON_##type: return #type + +static const char *ieee80211_get_reason_code_string(u16 reason_code) +{ + switch (reason_code) { + case_WLAN(UNSPECIFIED); + case_WLAN(PREV_AUTH_NOT_VALID); + case_WLAN(DEAUTH_LEAVING); + case_WLAN(DISASSOC_DUE_TO_INACTIVITY); + case_WLAN(DISASSOC_AP_BUSY); + case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); + case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); + case_WLAN(DISASSOC_STA_HAS_LEFT); + case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); + case_WLAN(DISASSOC_BAD_POWER); + case_WLAN(DISASSOC_BAD_SUPP_CHAN); + case_WLAN(INVALID_IE); + case_WLAN(MIC_FAILURE); + case_WLAN(4WAY_HANDSHAKE_TIMEOUT); + case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); + case_WLAN(IE_DIFFERENT); + case_WLAN(INVALID_GROUP_CIPHER); + case_WLAN(INVALID_PAIRWISE_CIPHER); + case_WLAN(INVALID_AKMP); + case_WLAN(UNSUPP_RSN_VERSION); + case_WLAN(INVALID_RSN_IE_CAP); + case_WLAN(IEEE8021X_FAILED); + case_WLAN(CIPHER_SUITE_REJECTED); + case_WLAN(DISASSOC_UNSPECIFIED_QOS); + case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); + case_WLAN(DISASSOC_LOW_ACK); + case_WLAN(DISASSOC_QAP_EXCEED_TXOP); + case_WLAN(QSTA_LEAVE_QBSS); + case_WLAN(QSTA_NOT_USE); + case_WLAN(QSTA_REQUIRE_SETUP); + case_WLAN(QSTA_TIMEOUT); + case_WLAN(QSTA_CIPHER_NOT_SUPP); + case_WLAN(MESH_PEER_CANCELED); + case_WLAN(MESH_MAX_PEERS); + case_WLAN(MESH_CONFIG); + case_WLAN(MESH_CLOSE); + case_WLAN(MESH_MAX_RETRIES); + case_WLAN(MESH_CONFIRM_TIMEOUT); + case_WLAN(MESH_INVALID_GTK); + case_WLAN(MESH_INCONSISTENT_PARAM); + case_WLAN(MESH_INVALID_SECURITY); + case_WLAN(MESH_PATH_ERROR); + case_WLAN(MESH_PATH_NOFORWARD); + case_WLAN(MESH_PATH_DEST_UNREACHABLE); + case_WLAN(MAC_EXISTS_IN_MBSS); + case_WLAN(MESH_CHAN_REGULATORY); + case_WLAN(MESH_CHAN); + default: return ""; + } +} static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, size_t len) @@ -2270,8 +2326,8 @@ static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); - sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n", - bssid, reason_code); + sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", + bssid, reason_code, ieee80211_get_reason_code_string(reason_code)); ieee80211_set_disassoc(sdata, 0, 0, false, NULL); @@ -4340,8 +4396,8 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, bool report_frame = false; sdata_info(sdata, - "deauthenticating from %pM by local choice (reason=%d)\n", - req->bssid, req->reason_code); + "deauthenticating from %pM by local choice (Reason: %u=%s)\n", + req->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); if (ifmgd->auth_data) { drv_mgd_prepare_tx(sdata->local, sdata); @@ -4387,8 +4443,8 @@ int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, return -ENOLINK; sdata_info(sdata, - "disassociating from %pM by local choice (reason=%d)\n", - req->bss->bssid, req->reason_code); + "disassociating from %pM by local choice (Reason: %u=%s)\n", + req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code)); memcpy(bssid, req->bss->bssid, ETH_ALEN); ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, From e7aceef4ac3180bd93d4c0d3fe23775850b6c31d Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 12 Feb 2014 14:21:15 +0100 Subject: [PATCH 09/22] cfg80211: remove NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL There's no driver using this flag and consequently no userspace application is actually looking at it. As it seems unlikely for any driver to start using it, remove it and the (very little) code that used it. Signed-off-by: Johannes Berg --- include/uapi/linux/nl80211.h | 7 +------ net/wireless/chan.c | 6 +----- 2 files changed, 2 insertions(+), 11 deletions(-) diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index a12e6cae5132..ba1f7625625c 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -3843,11 +3843,6 @@ enum nl80211_ap_sme_features { * @NL80211_FEATURE_CELL_BASE_REG_HINTS: This driver has been tested * to work properly to suppport receiving regulatory hints from * cellular base stations. - * @NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL: If this is set, an active - * P2P Device (%NL80211_IFTYPE_P2P_DEVICE) requires its own channel - * in the interface combinations, even when it's only used for scan - * and remain-on-channel. This could be due to, for example, the - * remain-on-channel implementation requiring a channel context. * @NL80211_FEATURE_SAE: This driver supports simultaneous authentication of * equals (SAE) with user space SME (NL80211_CMD_AUTHENTICATE) in station * mode @@ -3889,7 +3884,7 @@ enum nl80211_feature_flags { NL80211_FEATURE_HT_IBSS = 1 << 1, NL80211_FEATURE_INACTIVITY_TIMER = 1 << 2, NL80211_FEATURE_CELL_BASE_REG_HINTS = 1 << 3, - NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL = 1 << 4, + /* bit 4 is reserved - don't use */ NL80211_FEATURE_SAE = 1 << 5, NL80211_FEATURE_LOW_PRIORITY_SCAN = 1 << 6, NL80211_FEATURE_SCAN_FLUSH = 1 << 7, diff --git a/net/wireless/chan.c b/net/wireless/chan.c index f8ab7df1ab0d..5946450c5406 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -705,12 +705,8 @@ cfg80211_get_chan_state(struct wireless_dev *wdev, case NL80211_IFTYPE_MONITOR: case NL80211_IFTYPE_AP_VLAN: case NL80211_IFTYPE_WDS: - /* these interface types don't really have a channel */ - return; case NL80211_IFTYPE_P2P_DEVICE: - if (wdev->wiphy->features & - NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL) - *chanmode = CHAN_MODE_EXCLUSIVE; + /* these interface types don't really have a channel */ return; case NL80211_IFTYPE_UNSPECIFIED: case NUM_NL80211_IFTYPES: From 9900e4843c6c95cc951a642e337478831429be88 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 4 Feb 2014 21:01:25 +0100 Subject: [PATCH 10/22] nl80211: use ie_len in scheduled scan We've already checked the IE length and assigned request->ie based on that, so continue using it to make the code a bit clearer. Signed-off-by: Johannes Berg --- net/wireless/nl80211.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index ebea1a197afb..179786494308 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5709,8 +5709,8 @@ static int nl80211_start_sched_scan(struct sk_buff *skb, request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF; } - if (info->attrs[NL80211_ATTR_IE]) { - request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); + if (ie_len) { + request->ie_len = ie_len; memcpy((void *)request->ie, nla_data(info->attrs[NL80211_ATTR_IE]), request->ie_len); From 06d181a8fd58031db9c114d920b40d8820380a6e Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 4 Feb 2014 20:51:09 +0100 Subject: [PATCH 11/22] mac80211: add NAPI support back NAPI was originally added to mac80211 a long time ago (by John in commit 4e6cbfd09c66 in July 2010), but then removed years later (by Stanislaw in commit 30c97120c6c7 in February 2013). No driver ever used it, so that was fine. Now I'm adding support for NAPI to our driver, so add some code to mac80211 again to support NAPI. John was originally wrapping some (but not nearly all NAPI-related functions), but that doesn't scale very well with the number of functions that are there, some of which are even only inlines. Thus, instead of doing that, let the drivers manage the NAPI struct, except for napi_add() which is needed so mac80211 knows how to call napi_gro_receive(). Also remove some no longer needed definitions that were left when NAPI support was removed. Reviewed-by: Emmanuel Grumbach Reviewed-by: Eyal Shapira Signed-off-by: Johannes Berg --- include/net/mac80211.h | 34 +++++++++++++--------------------- net/mac80211/ieee80211_i.h | 2 ++ net/mac80211/main.c | 12 ++++++++++++ net/mac80211/rx.c | 5 ++++- 4 files changed, 31 insertions(+), 22 deletions(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 4005c5b4e3b4..2d4d31212eed 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1642,10 +1642,6 @@ enum ieee80211_hw_flags { * the hw can report back. * @max_rate_tries: maximum number of tries for each stage * - * @napi_weight: weight used for NAPI polling. You must specify an - * appropriate value here if a napi_poll operation is provided - * by your driver. - * * @max_rx_aggregation_subframes: maximum buffer size (number of * sub-frames) to be used for A-MPDU block ack receiver * aggregation. @@ -1699,7 +1695,6 @@ struct ieee80211_hw { int vif_data_size; int sta_data_size; int chanctx_data_size; - int napi_weight; u16 queues; u16 max_listen_interval; s8 max_signal; @@ -2622,8 +2617,6 @@ enum ieee80211_roc_type { * callback. They must then call ieee80211_chswitch_done() to indicate * completion of the channel switch. * - * @napi_poll: Poll Rx queue for incoming data frames. - * * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may * reject TX/RX mask combinations they cannot support by returning -EINVAL @@ -2882,7 +2875,6 @@ struct ieee80211_ops { void (*flush)(struct ieee80211_hw *hw, u32 queues, bool drop); void (*channel_switch)(struct ieee80211_hw *hw, struct ieee80211_channel_switch *ch_switch); - int (*napi_poll)(struct ieee80211_hw *hw, int budget); int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); @@ -3164,21 +3156,21 @@ void ieee80211_free_hw(struct ieee80211_hw *hw); */ void ieee80211_restart_hw(struct ieee80211_hw *hw); -/** ieee80211_napi_schedule - schedule NAPI poll +/** + * ieee80211_napi_add - initialize mac80211 NAPI context + * @hw: the hardware to initialize the NAPI context on + * @napi: the NAPI context to initialize + * @napi_dev: dummy NAPI netdevice, here to not waste the space if the + * driver doesn't use NAPI + * @poll: poll function + * @weight: default weight * - * Use this function to schedule NAPI polling on a device. - * - * @hw: the hardware to start polling + * See also netif_napi_add(). */ -void ieee80211_napi_schedule(struct ieee80211_hw *hw); - -/** ieee80211_napi_complete - complete NAPI polling - * - * Use this function to finish NAPI polling on a device. - * - * @hw: the hardware to stop polling - */ -void ieee80211_napi_complete(struct ieee80211_hw *hw); +void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, + struct net_device *napi_dev, + int (*poll)(struct napi_struct *, int), + int weight); /** * ieee80211_rx - receive frame diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 0014b5396ce5..8603dfb52b3a 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1242,6 +1242,8 @@ struct ieee80211_local { struct ieee80211_sub_if_data __rcu *p2p_sdata; + struct napi_struct *napi; + /* virtual monitor interface */ struct ieee80211_sub_if_data __rcu *monitor_sdata; struct cfg80211_chan_def monitor_chandef; diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 1f7d8422d62d..b055f6a55c68 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -1076,6 +1076,18 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) } EXPORT_SYMBOL(ieee80211_register_hw); +void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, + struct net_device *napi_dev, + int (*poll)(struct napi_struct *, int), + int weight) +{ + struct ieee80211_local *local = hw_to_local(hw); + + netif_napi_add(napi_dev, napi, poll, weight); + local->napi = napi; +} +EXPORT_SYMBOL_GPL(ieee80211_napi_add); + void ieee80211_unregister_hw(struct ieee80211_hw *hw) { struct ieee80211_local *local = hw_to_local(hw); diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 593062109c50..58e4b7052d17 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -1954,7 +1954,10 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx) /* deliver to local stack */ skb->protocol = eth_type_trans(skb, dev); memset(skb->cb, 0, sizeof(skb->cb)); - netif_receive_skb(skb); + if (rx->local->napi) + napi_gro_receive(rx->local->napi, skb); + else + netif_receive_skb(skb); } if (xmit_skb) { From d85dad75566674ca8012715ac00a84ced3697972 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 13 Feb 2014 13:27:42 +0100 Subject: [PATCH 12/22] mac80211: remove erroneous comment about RX radiotap header There's no way the driver can pre-build the radiotap header, so remove the comment stating that it can. Reported-by: Jouni Malinen Signed-off-by: Johannes Berg --- include/net/mac80211.h | 4 ---- 1 file changed, 4 deletions(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 2d4d31212eed..a6bcc39e146e 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -66,10 +66,6 @@ * * Secondly, when the hardware handles fragmentation, the frame handed to * the driver from mac80211 is the MSDU, not the MPDU. - * - * Finally, for received frames, the driver is able to indicate that it has - * filled a radiotap header and put that in front of the frame; if it does - * not do so then mac80211 may add this under certain circumstances. */ /** From df942e7ba70cd0a7aa9e0432b8a6a328de2c5574 Mon Sep 17 00:00:00 2001 From: Sunil Dutt Undekari Date: Thu, 20 Feb 2014 16:22:09 +0530 Subject: [PATCH 13/22] cfg80211: Pass TDLS peer capability information in tdls_mgmt While framing the TDLS Setup Confirmation frame, the driver needs to know if the TDLS peer is VHT/HT/WMM capable and thus shall construct the VHT/HT operation / WMM parameter elements accordingly. Supplicant determines if the TDLS peer is VHT/HT/WMM capable based on the presence of the respective IEs in the received TDLS Setup Response frame. The host driver should not need to parse the received TDLS Response frame and thus, should be able to rely on the supplicant to indicate the capability of the peer through additional flags while transmitting the TDLS Setup Confirmation frame through tdls_mgmt operations. Signed-off-by: Sunil Dutt Undekari Signed-off-by: Johannes Berg --- drivers/net/wireless/mwifiex/cfg80211.c | 4 ++-- include/net/cfg80211.h | 3 ++- include/uapi/linux/nl80211.h | 21 +++++++++++++++++++++ net/mac80211/cfg.c | 4 ++-- net/wireless/nl80211.c | 7 ++++++- net/wireless/rdev-ops.h | 9 ++++++--- net/wireless/trace.h | 12 ++++++++---- 7 files changed, 47 insertions(+), 13 deletions(-) diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c index 436ba437a4ba..6948a97af839 100644 --- a/drivers/net/wireless/mwifiex/cfg80211.c +++ b/drivers/net/wireless/mwifiex/cfg80211.c @@ -2600,8 +2600,8 @@ static int mwifiex_cfg80211_set_coalesce(struct wiphy *wiphy, static int mwifiex_cfg80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, u8 *peer, u8 action_code, u8 dialog_token, - u16 status_code, const u8 *extra_ies, - size_t extra_ies_len) + u16 status_code, u32 peer_capability, + const u8 *extra_ies, size_t extra_ies_len) { struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev); int ret; diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 9f90554e88c4..c89a5b5bd103 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -2465,7 +2465,8 @@ struct cfg80211_ops { int (*tdls_mgmt)(struct wiphy *wiphy, struct net_device *dev, u8 *peer, u8 action_code, u8 dialog_token, - u16 status_code, const u8 *buf, size_t len); + u16 status_code, u32 peer_capability, + const u8 *buf, size_t len); int (*tdls_oper)(struct wiphy *wiphy, struct net_device *dev, u8 *peer, enum nl80211_tdls_operation oper); diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index ba1f7625625c..47d7087513e0 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -1575,6 +1575,9 @@ enum nl80211_commands { * advertise values that cannot always be met. In such cases, an attempt * to add a new station entry with @NL80211_CMD_NEW_STATION may fail. * + * @NL80211_ATTR_TDLS_PEER_CAPABILITY: flags for TDLS peer capabilities, u32. + * As specified in the &enum nl80211_tdls_peer_capability. + * * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use */ @@ -1908,6 +1911,8 @@ enum nl80211_attrs { NL80211_ATTR_MAX_AP_ASSOC_STA, + NL80211_ATTR_TDLS_PEER_CAPABILITY, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -4074,4 +4079,20 @@ struct nl80211_vendor_cmd_info { __u32 subcmd; }; +/** + * enum nl80211_tdls_peer_capability - TDLS peer flags. + * + * Used by tdls_mgmt() to determine which conditional elements need + * to be added to TDLS Setup frames. + * + * @NL80211_TDLS_PEER_HT: TDLS peer is HT capable. + * @NL80211_TDLS_PEER_VHT: TDLS peer is VHT capable. + * @NL80211_TDLS_PEER_WMM: TDLS peer is WMM capable. + */ +enum nl80211_tdls_peer_capability { + NL80211_TDLS_PEER_HT = 1<<0, + NL80211_TDLS_PEER_VHT = 1<<1, + NL80211_TDLS_PEER_WMM = 1<<2, +}; + #endif /* __LINUX_NL80211_H */ diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 3849fd07a321..1acb29109b45 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -3644,8 +3644,8 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, static int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, u8 *peer, u8 action_code, u8 dialog_token, - u16 status_code, const u8 *extra_ies, - size_t extra_ies_len) + 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; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 058aa0e1a462..be836098d342 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -384,6 +384,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { .len = IEEE80211_QOS_MAP_LEN_MAX }, [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN }, [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 }, + [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 }, }; /* policy for the key attributes */ @@ -7269,6 +7270,7 @@ static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info) struct cfg80211_registered_device *rdev = info->user_ptr[0]; struct net_device *dev = info->user_ptr[1]; u8 action_code, dialog_token; + u32 peer_capability = 0; u16 status_code; u8 *peer; @@ -7287,9 +7289,12 @@ static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info) action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]); status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]); dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]); + if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]) + peer_capability = + nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]); return rdev_tdls_mgmt(rdev, dev, peer, action_code, - dialog_token, status_code, + dialog_token, status_code, peer_capability, nla_data(info->attrs[NL80211_ATTR_IE]), nla_len(info->attrs[NL80211_ATTR_IE])); } diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h index c8e225947adb..74d97d33c938 100644 --- a/net/wireless/rdev-ops.h +++ b/net/wireless/rdev-ops.h @@ -769,13 +769,16 @@ static inline int rdev_set_rekey_data(struct cfg80211_registered_device *rdev, static inline int rdev_tdls_mgmt(struct cfg80211_registered_device *rdev, struct net_device *dev, u8 *peer, u8 action_code, u8 dialog_token, - u16 status_code, const u8 *buf, size_t len) + u16 status_code, u32 peer_capability, + const u8 *buf, size_t len) { int ret; trace_rdev_tdls_mgmt(&rdev->wiphy, dev, peer, action_code, - dialog_token, status_code, buf, len); + dialog_token, status_code, peer_capability, + buf, len); ret = rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code, - dialog_token, status_code, buf, len); + dialog_token, status_code, peer_capability, + buf, len); trace_rdev_return_int(&rdev->wiphy, ret); return ret; } diff --git a/net/wireless/trace.h b/net/wireless/trace.h index 5eaeed59db07..aabccf13e07b 100644 --- a/net/wireless/trace.h +++ b/net/wireless/trace.h @@ -1468,9 +1468,10 @@ TRACE_EVENT(rdev_sched_scan_start, TRACE_EVENT(rdev_tdls_mgmt, TP_PROTO(struct wiphy *wiphy, struct net_device *netdev, u8 *peer, u8 action_code, u8 dialog_token, - u16 status_code, const u8 *buf, size_t len), + u16 status_code, u32 peer_capability, + const u8 *buf, size_t len), TP_ARGS(wiphy, netdev, peer, action_code, dialog_token, status_code, - buf, len), + peer_capability, buf, len), TP_STRUCT__entry( WIPHY_ENTRY NETDEV_ENTRY @@ -1478,6 +1479,7 @@ TRACE_EVENT(rdev_tdls_mgmt, __field(u8, action_code) __field(u8, dialog_token) __field(u16, status_code) + __field(u32, peer_capability) __dynamic_array(u8, buf, len) ), TP_fast_assign( @@ -1487,13 +1489,15 @@ TRACE_EVENT(rdev_tdls_mgmt, __entry->action_code = action_code; __entry->dialog_token = dialog_token; __entry->status_code = status_code; + __entry->peer_capability = peer_capability; memcpy(__get_dynamic_array(buf), buf, len); ), TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", " MAC_PR_FMT ", action_code: %u, " - "dialog_token: %u, status_code: %u, buf: %#.2x ", + "dialog_token: %u, status_code: %u, peer_capability: %u buf: %#.2x ", WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(peer), __entry->action_code, __entry->dialog_token, - __entry->status_code, ((u8 *)__get_dynamic_array(buf))[0]) + __entry->status_code, __entry->peer_capability, + ((u8 *)__get_dynamic_array(buf))[0]) ); TRACE_EVENT(rdev_dump_survey, From d9b8396a52b4e857263eeb9e1eba474ea11c19bf Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 13 Feb 2014 17:16:10 +0100 Subject: [PATCH 14/22] cfg80211: document sched_scan_stop synchronous behaviour Due to userspace assumptions, the sched_scan_stop operation must be synchronous, i.e. once it returns a new scheduled scan must be able to start immediately. Document this in the API. Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 7 ++++++- include/uapi/linux/nl80211.h | 5 +++-- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index c89a5b5bd103..7c9fe4b05927 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -2206,7 +2206,12 @@ struct cfg80211_qos_map { * @set_cqm_txe_config: Configure connection quality monitor TX error * thresholds. * @sched_scan_start: Tell the driver to start a scheduled scan. - * @sched_scan_stop: Tell the driver to stop an ongoing scheduled scan. + * @sched_scan_stop: Tell the driver to stop an ongoing scheduled scan. This + * call must stop the scheduled scan and be ready for starting a new one + * before it returns, i.e. @sched_scan_start may be called immediately + * after that again and should not fail in that case. The driver should + * not call cfg80211_sched_scan_stopped() for a requested stop (when this + * method returns 0.) * * @mgmt_frame_register: Notify driver that a management frame type was * registered. Note that this callback may not sleep, and cannot run diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 47d7087513e0..81481cff1dc1 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -303,8 +303,9 @@ * passed, all channels allowed for the current regulatory domain * are used. Extra IEs can also be passed from the userspace by * using the %NL80211_ATTR_IE attribute. - * @NL80211_CMD_STOP_SCHED_SCAN: stop a scheduled scan. Returns -ENOENT - * if scheduled scan is not running. + * @NL80211_CMD_STOP_SCHED_SCAN: stop a scheduled scan. Returns -ENOENT if + * scheduled scan is not running. The caller may assume that as soon + * as the call returns, it is safe to start a new scheduled scan again. * @NL80211_CMD_SCHED_SCAN_RESULTS: indicates that there are scheduled scan * results available. * @NL80211_CMD_SCHED_SCAN_STOPPED: indicates that the scheduled scan has From 37e3308cb2b6933019d9d9c2045877d6d68d9c5a Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 17 Feb 2014 10:48:17 +0100 Subject: [PATCH 15/22] mac80211: allow driver to return error from sched_scan_stop In order to solve races with sched_scan_stop, it is necessary for the driver to be able to return an error to propagate that to cfg80211 so it doesn't send an event. Reviewed-by: Alexander Bondar Signed-off-by: Johannes Berg --- drivers/net/wireless/iwlwifi/mvm/mac80211.c | 6 ++++-- drivers/net/wireless/ti/wlcore/main.c | 6 ++++-- include/net/mac80211.h | 3 ++- net/mac80211/driver-ops.h | 12 ++++++++---- net/mac80211/scan.c | 2 +- 5 files changed, 19 insertions(+), 10 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c index beaf8140abbf..7492fc0f2766 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c @@ -1746,14 +1746,16 @@ out: return ret; } -static void iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw, - struct ieee80211_vif *vif) +static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) { struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); mutex_lock(&mvm->mutex); iwl_mvm_sched_scan_stop(mvm); mutex_unlock(&mvm->mutex); + + return 0; } static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw, diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c index 7aae5b3a0c2c..4175a57ac9f5 100644 --- a/drivers/net/wireless/ti/wlcore/main.c +++ b/drivers/net/wireless/ti/wlcore/main.c @@ -3668,8 +3668,8 @@ out: return ret; } -static void wl1271_op_sched_scan_stop(struct ieee80211_hw *hw, - struct ieee80211_vif *vif) +static int wl1271_op_sched_scan_stop(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) { struct wl1271 *wl = hw->priv; struct wl12xx_vif *wlvif = wl12xx_vif_to_data(vif); @@ -3691,6 +3691,8 @@ static void wl1271_op_sched_scan_stop(struct ieee80211_hw *hw, wl1271_ps_elp_sleep(wl); out: mutex_unlock(&wl->mutex); + + return 0; } static int wl1271_op_set_frag_threshold(struct ieee80211_hw *hw, u32 value) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index a6bcc39e146e..86faa413b37d 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -2460,6 +2460,7 @@ enum ieee80211_roc_type { * This process will continue until sched_scan_stop is called. * * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. + * In this case, ieee80211_sched_scan_stopped() must not be called. * * @sw_scan_start: Notifier function that is called just before a software scan * is started. Can be NULL, if the driver doesn't need this notification. @@ -2807,7 +2808,7 @@ struct ieee80211_ops { struct ieee80211_vif *vif, struct cfg80211_sched_scan_request *req, struct ieee80211_sched_scan_ies *ies); - void (*sched_scan_stop)(struct ieee80211_hw *hw, + int (*sched_scan_stop)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); void (*sw_scan_start)(struct ieee80211_hw *hw); void (*sw_scan_complete)(struct ieee80211_hw *hw); diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h index ef8b385eff04..fc689f5d971e 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -354,16 +354,20 @@ drv_sched_scan_start(struct ieee80211_local *local, return ret; } -static inline void drv_sched_scan_stop(struct ieee80211_local *local, - struct ieee80211_sub_if_data *sdata) +static inline int drv_sched_scan_stop(struct ieee80211_local *local, + struct ieee80211_sub_if_data *sdata) { + int ret; + might_sleep(); check_sdata_in_driver(sdata); trace_drv_sched_scan_stop(local, sdata); - local->ops->sched_scan_stop(&local->hw, &sdata->vif); - trace_drv_return_void(local); + ret = local->ops->sched_scan_stop(&local->hw, &sdata->vif); + trace_drv_return_int(local, ret); + + return ret; } static inline void drv_sw_scan_start(struct ieee80211_local *local) diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index b211e412511f..836f500dfbf3 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -1056,7 +1056,7 @@ int ieee80211_request_sched_scan_stop(struct ieee80211_sub_if_data *sdata) local->sched_scan_req = NULL; if (rcu_access_pointer(local->sched_scan_sdata)) - drv_sched_scan_stop(local, sdata); + ret = drv_sched_scan_stop(local, sdata); out: mutex_unlock(&local->mtx); From b0dfd2ea12d92b49639ad84f24ddd00c7ac144b5 Mon Sep 17 00:00:00 2001 From: Janusz Dziedzic Date: Thu, 20 Feb 2014 13:52:16 +0100 Subject: [PATCH 16/22] cfg80211: regulatory: introduce NL80211_RRF_AUTO_BW rule flag Introduce NL80211_RRF_AUTO_BW rule flag. If this flag set maximum available bandwidth should be calculated base on contiguous rules and wider channels will be allowed to cross multiple contiguous/overlapping frequency ranges. In case of old kernels maximum bandwidth from regulatory rule will be used, while there is no NL80211_RRF_AUTO_BW flag. This fixes the previous commit 9752482083066af7ac18a5ca376f ("cfg80211: regulatory introduce maximum bandwidth calculation") which was found to be a problem for userspace API compatibility. Signed-off-by: Janusz Dziedzic [edit commit log, use sizeof()] Signed-off-by: Johannes Berg Signed-off-by: Johannes Berg --- include/uapi/linux/nl80211.h | 9 ++-- net/wireless/genregdb.awk | 2 + net/wireless/nl80211.c | 7 +-- net/wireless/reg.c | 83 ++++++++++++++++++++---------------- 4 files changed, 58 insertions(+), 43 deletions(-) diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 81481cff1dc1..ff72cab3cd3a 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -2443,10 +2443,7 @@ enum nl80211_reg_type { * in KHz. This is not a center a frequency but an actual regulatory * band edge. * @NL80211_ATTR_FREQ_RANGE_MAX_BW: maximum allowed bandwidth for this - * frequency range, in KHz. If not present or 0, maximum available - * bandwidth should be calculated base on contiguous rules and wider - * channels will be allowed to cross multiple contiguous/overlapping - * frequency ranges. + * frequency range, in KHz. * @NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN: the maximum allowed antenna gain * for a given frequency range. The value is in mBi (100 * dBi). * If you don't have one then don't send this. @@ -2517,6 +2514,9 @@ enum nl80211_sched_scan_match_attr { * @NL80211_RRF_NO_IR: no mechanisms that initiate radiation are allowed, * this includes probe requests or modes of operation that require * beaconing. + * @NL80211_RRF_AUTO_BW: maximum available bandwidth should be calculated + * base on contiguous rules and wider channels will be allowed to cross + * multiple contiguous/overlapping frequency ranges. */ enum nl80211_reg_rule_flags { NL80211_RRF_NO_OFDM = 1<<0, @@ -2528,6 +2528,7 @@ enum nl80211_reg_rule_flags { NL80211_RRF_PTMP_ONLY = 1<<6, NL80211_RRF_NO_IR = 1<<7, __NL80211_RRF_NO_IBSS = 1<<8, + NL80211_RRF_AUTO_BW = 1<<11, }; #define NL80211_RRF_PASSIVE_SCAN NL80211_RRF_NO_IR diff --git a/net/wireless/genregdb.awk b/net/wireless/genregdb.awk index 9a8217d2a908..fdfd3f063a9b 100644 --- a/net/wireless/genregdb.awk +++ b/net/wireless/genregdb.awk @@ -105,6 +105,8 @@ function parse_reg_rule() flags = flags "\n\t\t\tNL80211_RRF_NO_IR | " } else if (flagarray[arg] == "NO-IR") { flags = flags "\n\t\t\tNL80211_RRF_NO_IR | " + } else if (flagarray[arg] == "AUTO-BW") { + flags = flags "\n\t\t\tNL80211_RRF_AUTO_BW | " } } diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index be836098d342..1e5a434e4224 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -4628,6 +4628,8 @@ static int parse_reg_rule(struct nlattr *tb[], return -EINVAL; if (!tb[NL80211_ATTR_FREQ_RANGE_END]) return -EINVAL; + if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) + return -EINVAL; if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]) return -EINVAL; @@ -4637,9 +4639,8 @@ static int parse_reg_rule(struct nlattr *tb[], nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]); freq_range->end_freq_khz = nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]); - if (tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) - freq_range->max_bandwidth_khz = - nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]); + freq_range->max_bandwidth_khz = + nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]); power_rule->max_eirp = nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]); diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 27c5253e7a61..6b6f33ad78f2 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -563,9 +563,6 @@ unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) break; - if (freq_range_tmp->max_bandwidth_khz) - break; - freq_range = freq_range_tmp; } @@ -582,9 +579,6 @@ unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) break; - if (freq_range_tmp->max_bandwidth_khz) - break; - freq_range = freq_range_tmp; } @@ -729,21 +723,29 @@ static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, max_bandwidth1 = freq_range1->max_bandwidth_khz; max_bandwidth2 = freq_range2->max_bandwidth_khz; - /* - * In case max_bandwidth1 == 0 and max_bandwith2 == 0 set - * output bandwidth as 0 (auto calculation). Next we will - * calculate this correctly in handle_channel function. - * In other case calculate output bandwidth here. - */ - if (max_bandwidth1 || max_bandwidth2) { - if (!max_bandwidth1) - max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); - if (!max_bandwidth2) - max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); - } + if (rule1->flags & NL80211_RRF_AUTO_BW) + max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); + if (rule2->flags & NL80211_RRF_AUTO_BW) + max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); + intersected_rule->flags = rule1->flags | rule2->flags; + + /* + * In case NL80211_RRF_AUTO_BW requested for both rules + * set AUTO_BW in intersected rule also. Next we will + * calculate BW correctly in handle_channel function. + * In other case remove AUTO_BW flag while we calculate + * maximum bandwidth correctly and auto calculation is + * not required. + */ + if ((rule1->flags & NL80211_RRF_AUTO_BW) && + (rule2->flags & NL80211_RRF_AUTO_BW)) + intersected_rule->flags |= NL80211_RRF_AUTO_BW; + else + intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; + freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; if (freq_range->max_bandwidth_khz > freq_diff) freq_range->max_bandwidth_khz = freq_diff; @@ -753,8 +755,6 @@ static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, power_rule2->max_antenna_gain); - intersected_rule->flags = rule1->flags | rule2->flags; - if (!is_valid_reg_rule(intersected_rule)) return -EINVAL; @@ -938,31 +938,42 @@ const char *reg_initiator_name(enum nl80211_reg_initiator initiator) EXPORT_SYMBOL(reg_initiator_name); #ifdef CONFIG_CFG80211_REG_DEBUG -static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, +static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, + struct ieee80211_channel *chan, const struct ieee80211_reg_rule *reg_rule) { const struct ieee80211_power_rule *power_rule; const struct ieee80211_freq_range *freq_range; - char max_antenna_gain[32]; + char max_antenna_gain[32], bw[32]; power_rule = ®_rule->power_rule; freq_range = ®_rule->freq_range; if (!power_rule->max_antenna_gain) - snprintf(max_antenna_gain, 32, "N/A"); + snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); else - snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); + snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", + power_rule->max_antenna_gain); + + if (reg_rule->flags & NL80211_RRF_AUTO_BW) + snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", + freq_range->max_bandwidth_khz, + reg_get_max_bandwidth(regd, reg_rule)); + else + snprintf(bw, sizeof(bw), "%d KHz", + freq_range->max_bandwidth_khz); REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", chan->center_freq); - REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", + REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", freq_range->start_freq_khz, freq_range->end_freq_khz, - freq_range->max_bandwidth_khz, max_antenna_gain, + bw, max_antenna_gain, power_rule->max_eirp); } #else -static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, +static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, + struct ieee80211_channel *chan, const struct ieee80211_reg_rule *reg_rule) { return; @@ -1022,17 +1033,16 @@ static void handle_channel(struct wiphy *wiphy, return; } - chan_reg_rule_print_dbg(chan, reg_rule); + regd = reg_get_regdomain(wiphy); + chan_reg_rule_print_dbg(regd, chan, reg_rule); power_rule = ®_rule->power_rule; freq_range = ®_rule->freq_range; max_bandwidth_khz = freq_range->max_bandwidth_khz; /* Check if auto calculation requested */ - if (!max_bandwidth_khz) { - regd = reg_get_regdomain(wiphy); + if (reg_rule->flags & NL80211_RRF_AUTO_BW) max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); - } if (max_bandwidth_khz < MHZ_TO_KHZ(40)) bw_flags = IEEE80211_CHAN_NO_HT40; @@ -1437,14 +1447,14 @@ static void handle_channel_custom(struct wiphy *wiphy, return; } - chan_reg_rule_print_dbg(chan, reg_rule); + chan_reg_rule_print_dbg(regd, chan, reg_rule); power_rule = ®_rule->power_rule; freq_range = ®_rule->freq_range; max_bandwidth_khz = freq_range->max_bandwidth_khz; /* Check if auto calculation requested */ - if (!max_bandwidth_khz) + if (reg_rule->flags & NL80211_RRF_AUTO_BW) max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); if (max_bandwidth_khz < MHZ_TO_KHZ(40)) @@ -2254,11 +2264,12 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd) freq_range = ®_rule->freq_range; power_rule = ®_rule->power_rule; - if (!freq_range->max_bandwidth_khz) - snprintf(bw, 32, "%d KHz, AUTO", + if (reg_rule->flags & NL80211_RRF_AUTO_BW) + snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", + freq_range->max_bandwidth_khz, reg_get_max_bandwidth(rd, reg_rule)); else - snprintf(bw, 32, "%d KHz", + snprintf(bw, sizeof(bw), "%d KHz", freq_range->max_bandwidth_khz); /* From 0fcf8ac5acb60839ada695b069362761f1f2da71 Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Thu, 20 Feb 2014 16:45:33 +0200 Subject: [PATCH 17/22] cfg80211: docbook: fix small formatting error docbook (or one of its friends) gets confused with semi-colons in the argument descriptions, causing it to think that the semi-colon is marking a new section in the description of addr_mask in wiphy struct. Prevent this by using hyphens instead of semi-colons in the mask example. Signed-off-by: Luciano Coelho Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 7c9fe4b05927..b36a822b9028 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -2796,7 +2796,7 @@ struct wiphy_vendor_command { * @perm_addr: permanent MAC address of this device * @addr_mask: If the device supports multiple MAC addresses by masking, * set this to a mask with variable bits set to 1, e.g. if the last - * four bits are variable then set it to 00:...:00:0f. The actual + * four bits are variable then set it to 00-00-00-00-00-0f. The actual * variable bits shall be determined by the interfaces added, with * interfaces not matching the mask being rejected to be brought up. * @n_addresses: number of addresses in @addresses. From b80edbc177800623dd07240e19e69c7b16ee5cba Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Thu, 20 Feb 2014 16:45:34 +0200 Subject: [PATCH 18/22] cfg80211: docbook: add interface combinations documentation Add the ieee80211_iface_limit and the ieee80211_iface_combination structures to docbook. Reformat the examples of combinations slightly, so it looks a bit better on docbook. Signed-off-by: Luciano Coelho Signed-off-by: Johannes Berg --- Documentation/DocBook/80211.tmpl | 2 ++ include/net/cfg80211.h | 12 ++++++++---- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/Documentation/DocBook/80211.tmpl b/Documentation/DocBook/80211.tmpl index 46ad6faee9ab..044b76436e83 100644 --- a/Documentation/DocBook/80211.tmpl +++ b/Documentation/DocBook/80211.tmpl @@ -98,6 +98,8 @@ !Finclude/net/cfg80211.h priv_to_wiphy !Finclude/net/cfg80211.h set_wiphy_dev !Finclude/net/cfg80211.h wdev_priv +!Finclude/net/cfg80211.h ieee80211_iface_limit +!Finclude/net/cfg80211.h ieee80211_iface_combination Actions and configuration diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index b36a822b9028..8c9ba44fb7cf 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -2616,9 +2616,12 @@ struct ieee80211_iface_limit { * only in special cases. * @radar_detect_widths: bitmap of channel widths supported for radar detection * - * These examples can be expressed as follows: + * With this structure the driver can describe which interface + * combinations it supports concurrently. * - * Allow #STA <= 1, #AP <= 1, matching BI, channels = 1, 2 total: + * Examples: + * + * 1. Allow #STA <= 1, #AP <= 1, matching BI, channels = 1, 2 total: * * struct ieee80211_iface_limit limits1[] = { * { .max = 1, .types = BIT(NL80211_IFTYPE_STATION), }, @@ -2632,7 +2635,7 @@ struct ieee80211_iface_limit { * }; * * - * Allow #{AP, P2P-GO} <= 8, channels = 1, 8 total: + * 2. Allow #{AP, P2P-GO} <= 8, channels = 1, 8 total: * * struct ieee80211_iface_limit limits2[] = { * { .max = 8, .types = BIT(NL80211_IFTYPE_AP) | @@ -2646,7 +2649,8 @@ struct ieee80211_iface_limit { * }; * * - * Allow #STA <= 1, #{P2P-client,P2P-GO} <= 3 on two channels, 4 total. + * 3. Allow #STA <= 1, #{P2P-client,P2P-GO} <= 3 on two channels, 4 total. + * * This allows for an infrastructure connection and three P2P connections. * * struct ieee80211_iface_limit limits3[] = { From 30f55dc171a32d60e3753c9e0a3cf33a4d6c4610 Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Thu, 20 Feb 2014 16:41:51 +0200 Subject: [PATCH 19/22] mac80211: allow drivers to request SMPS off Previously we were warning and using automatic when a driver sent an update request with SMPS off. This patch makes it possible for drivers to disable SMPS at runtime, for whatever reason. Signed-off-by: Luciano Coelho Signed-off-by: Johannes Berg --- net/mac80211/ht.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c index afbe2b203c3e..c150b68436d7 100644 --- a/net/mac80211/ht.c +++ b/net/mac80211/ht.c @@ -482,8 +482,6 @@ void ieee80211_request_smps(struct ieee80211_vif *vif, return; if (vif->type == NL80211_IFTYPE_STATION) { - if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF)) - smps_mode = IEEE80211_SMPS_AUTOMATIC; if (sdata->u.mgd.driver_smps_mode == smps_mode) return; sdata->u.mgd.driver_smps_mode = smps_mode; From e5d2f954714bccd4a87e042720ae8e85f9a0aada Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Thu, 20 Feb 2014 16:36:20 +0200 Subject: [PATCH 20/22] nl80211: make sure we check for DFS with mesh channel switch Since mesh support for DFS channels was added, we also need to check for DFS channels when performing a channel switch with NL80211_IFTYPE_MESHPOINT. Signed-off-by: Luciano Coelho [use switch statement, slight code cleanup] Signed-off-by: Johannes Berg --- net/wireless/nl80211.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 1e5a434e4224..2c38b28a85b9 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5913,17 +5913,22 @@ skip_beacons: if (!cfg80211_reg_can_beacon(&rdev->wiphy, ¶ms.chandef)) return -EINVAL; - if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP || - dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO || - dev->ieee80211_ptr->iftype == NL80211_IFTYPE_ADHOC) { + switch (dev->ieee80211_ptr->iftype) { + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: + case NL80211_IFTYPE_ADHOC: + case NL80211_IFTYPE_MESH_POINT: err = cfg80211_chandef_dfs_required(wdev->wiphy, ¶ms.chandef); - if (err < 0) { + if (err < 0) return err; - } else if (err) { + if (err) { radar_detect_width = BIT(params.chandef.width); params.radar_required = true; } + break; + default: + break; } err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, From 7b2106aea2638948806df248215b14efd84c5ffc Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Thu, 20 Feb 2014 16:36:21 +0200 Subject: [PATCH 21/22] cfg80211: remove radar requirements check from cfg80211_can_use_iftype_chan() We don't have to double check whether the parameters passed to cfg80211_can_use_iftype_chan() are correct. We should just make sure they *are* when we call this function. Remove the radar_detect argument check in cfg80211_can_use_iftype_chan() to simplify the code. Signed-off-by: Luciano Coelho [keep braces around a long comment + single statement] Signed-off-by: Johannes Berg --- net/wireless/ibss.c | 7 +++---- net/wireless/mesh.c | 6 ++++++ net/wireless/util.c | 31 +------------------------------ 3 files changed, 10 insertions(+), 34 deletions(-) diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c index 1470b90e438f..349db9ddc0d1 100644 --- a/net/wireless/ibss.c +++ b/net/wireless/ibss.c @@ -128,12 +128,11 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev, #endif check_chan = params->chandef.chan; if (params->userspace_handles_dfs) { - /* use channel NULL to check for radar even if the current - * channel is not a radar channel - it might decide to change - * to DFS channel later. + /* Check for radar even if the current channel is not + * a radar channel - it might decide to change to DFS + * channel later. */ radar_detect_width = BIT(params->chandef.width); - check_chan = NULL; } err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype, diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c index d42a3fcb2f67..5af5cc6b2c4c 100644 --- a/net/wireless/mesh.c +++ b/net/wireless/mesh.c @@ -236,6 +236,12 @@ int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev, if (!netif_running(wdev->netdev)) return -ENETDOWN; + /* cfg80211_can_use_chan() calls + * cfg80211_can_use_iftype_chan() with no radar + * detection, so if we're trying to use a radar + * channel here, something is wrong. + */ + WARN_ON_ONCE(chandef->chan->flags & IEEE80211_CHAN_RADAR); err = cfg80211_can_use_chan(rdev, wdev, chandef->chan, CHAN_MODE_SHARED); if (err) diff --git a/net/wireless/util.c b/net/wireless/util.c index 780b4546c9c7..57b3ce7a6b92 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -1269,7 +1269,6 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, enum cfg80211_chan_mode chmode; int num_different_channels = 0; int total = 1; - bool radar_required = false; int i, j; ASSERT_RTNL(); @@ -1277,35 +1276,7 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev, if (WARN_ON(hweight32(radar_detect) > 1)) return -EINVAL; - switch (iftype) { - case NL80211_IFTYPE_ADHOC: - case NL80211_IFTYPE_AP: - case NL80211_IFTYPE_AP_VLAN: - case NL80211_IFTYPE_MESH_POINT: - case NL80211_IFTYPE_P2P_GO: - case NL80211_IFTYPE_WDS: - /* if the interface could potentially choose a DFS channel, - * then mark DFS as required. - */ - if (!chan) { - if (chanmode != CHAN_MODE_UNDEFINED && radar_detect) - radar_required = true; - break; - } - radar_required = !!(chan->flags & IEEE80211_CHAN_RADAR); - break; - case NL80211_IFTYPE_P2P_CLIENT: - case NL80211_IFTYPE_STATION: - case NL80211_IFTYPE_P2P_DEVICE: - case NL80211_IFTYPE_MONITOR: - break; - case NUM_NL80211_IFTYPES: - case NL80211_IFTYPE_UNSPECIFIED: - default: - return -EINVAL; - } - - if (radar_required && !radar_detect) + if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) return -EINVAL; /* Always allow software iftypes */ From 6658ab80fd4ef940fc2366ddb66690a15ea69c18 Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Thu, 20 Feb 2014 16:36:23 +0200 Subject: [PATCH 22/22] mac80211: ibss: handle cfg80211_chandef_dfs_required() error codes Error codes returned by cfg80211_chandef_dfs_required() are ignored when trying to join an IBSS. Fix this by printing an error and returning. Signed-off-by: Luciano Coelho Signed-off-by: Johannes Berg --- net/mac80211/ibss.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 4453e2725e40..e458ca0dffec 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -283,6 +283,11 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, err = cfg80211_chandef_dfs_required(sdata->local->hw.wiphy, &chandef); + 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,