From 089027e57cfa79337feffdd7252c8ba0be352afa Mon Sep 17 00:00:00 2001 From: Janusz Dziedzic Date: Fri, 21 Feb 2014 19:46:12 +0100 Subject: cfg80211: regulatory: allow getting DFS CAC time from userspace Introduce DFS CAC time as a regd param, configured per REG_RULE and set per channel in cfg80211. DFS CAC time is close connected with regulatory database configuration. Instead of using hardcoded values, get DFS CAC time form regulatory database. Pass DFS CAC time to user mode (mainly for iw reg get, iw list, iw info). Allow setting DFS CAC time via CRDA. Add support for internal regulatory database. Signed-off-by: Janusz Dziedzic [rewrap commit log] Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 2 ++ include/net/regulatory.h | 21 +++++++++++++-------- 2 files changed, 15 insertions(+), 8 deletions(-) (limited to 'include/net') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 8c9ba44fb7c..bfa9a0c7b2d 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -151,6 +151,7 @@ enum ieee80211_channel_flags { * @dfs_state: current state of this channel. Only relevant if radar is required * on this channel. * @dfs_state_entered: timestamp (jiffies) when the dfs state was entered. + * @dfs_cac_ms: DFS CAC time in milliseconds, this is valid for DFS channels. */ struct ieee80211_channel { enum ieee80211_band band; @@ -165,6 +166,7 @@ struct ieee80211_channel { int orig_mag, orig_mpwr; enum nl80211_dfs_state dfs_state; unsigned long dfs_state_entered; + unsigned int dfs_cac_ms; }; /** diff --git a/include/net/regulatory.h b/include/net/regulatory.h index b07cdc9fa45..75fc1f5a948 100644 --- a/include/net/regulatory.h +++ b/include/net/regulatory.h @@ -155,6 +155,7 @@ struct ieee80211_reg_rule { struct ieee80211_freq_range freq_range; struct ieee80211_power_rule power_rule; u32 flags; + u32 dfs_cac_ms; }; struct ieee80211_regdomain { @@ -172,14 +173,18 @@ struct ieee80211_regdomain { #define DBM_TO_MBM(gain) ((gain) * 100) #define MBM_TO_DBM(gain) ((gain) / 100) -#define REG_RULE(start, end, bw, gain, eirp, reg_flags) \ -{ \ - .freq_range.start_freq_khz = MHZ_TO_KHZ(start), \ - .freq_range.end_freq_khz = MHZ_TO_KHZ(end), \ - .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \ - .power_rule.max_antenna_gain = DBI_TO_MBI(gain),\ - .power_rule.max_eirp = DBM_TO_MBM(eirp), \ - .flags = reg_flags, \ +#define REG_RULE_EXT(start, end, bw, gain, eirp, dfs_cac, reg_flags) \ +{ \ + .freq_range.start_freq_khz = MHZ_TO_KHZ(start), \ + .freq_range.end_freq_khz = MHZ_TO_KHZ(end), \ + .freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw), \ + .power_rule.max_antenna_gain = DBI_TO_MBI(gain), \ + .power_rule.max_eirp = DBM_TO_MBM(eirp), \ + .flags = reg_flags, \ + .dfs_cac_ms = dfs_cac, \ } +#define REG_RULE(start, end, bw, gain, eirp, reg_flags) \ + REG_RULE_EXT(start, end, bw, gain, eirp, 0, reg_flags) + #endif -- cgit v1.2.3-70-g09d2 From 31559f35c5724976fd975e5d7e90cdb693b8dd27 Mon Sep 17 00:00:00 2001 From: Janusz Dziedzic Date: Fri, 21 Feb 2014 19:46:13 +0100 Subject: cfg80211: DFS get CAC time from regulatory database Send Channel Availability Check time as a parameter of start_radar_detection() callback. Get CAC time from regulatory database. Signed-off-by: Janusz Dziedzic Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 5 ++++- net/mac80211/cfg.c | 8 ++++---- net/wireless/chan.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++ net/wireless/core.h | 3 +++ net/wireless/mlme.c | 2 +- net/wireless/nl80211.c | 9 +++++++- 6 files changed, 76 insertions(+), 7 deletions(-) (limited to 'include/net') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index bfa9a0c7b2d..ff3af16eba2 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -2505,7 +2505,8 @@ struct cfg80211_ops { int (*start_radar_detection)(struct wiphy *wiphy, struct net_device *dev, - struct cfg80211_chan_def *chandef); + struct cfg80211_chan_def *chandef, + u32 cac_time_ms); int (*update_ft_ies)(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_update_ft_ies_params *ftie); int (*crit_proto_start)(struct wiphy *wiphy, @@ -3182,6 +3183,7 @@ struct cfg80211_cached_keys; * @p2p_started: true if this is a P2P Device that has been started * @cac_started: true if DFS channel availability check has been started * @cac_start_time: timestamp (jiffies) when the dfs state was entered. + * @cac_time_ms: CAC time in ms * @ps: powersave mode is enabled * @ps_timeout: dynamic powersave timeout * @ap_unexpected_nlportid: (private) netlink port ID of application @@ -3237,6 +3239,7 @@ struct wireless_dev { bool cac_started; unsigned long cac_start_time; + unsigned int cac_time_ms; #ifdef CONFIG_CFG80211_WEXT /* wext data */ diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 1acb29109b4..80534f524fd 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -2914,11 +2914,11 @@ static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy, static int ieee80211_start_radar_detection(struct wiphy *wiphy, struct net_device *dev, - struct cfg80211_chan_def *chandef) + struct cfg80211_chan_def *chandef, + u32 cac_time_ms) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_local *local = sdata->local; - unsigned long timeout; int err; mutex_lock(&local->mtx); @@ -2937,9 +2937,9 @@ static int ieee80211_start_radar_detection(struct wiphy *wiphy, if (err) goto out_unlock; - timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_CAC_TIME_MS); ieee80211_queue_delayed_work(&sdata->local->hw, - &sdata->dfs_cac_timer_work, timeout); + &sdata->dfs_cac_timer_work, + msecs_to_jiffies(cac_time_ms)); out_unlock: mutex_unlock(&local->mtx); diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 5946450c540..8659d5cee2a 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -490,6 +490,62 @@ static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, return r; } +static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, + u32 center_freq, + u32 bandwidth) +{ + struct ieee80211_channel *c; + u32 start_freq, end_freq, freq; + unsigned int dfs_cac_ms = 0; + + start_freq = cfg80211_get_start_freq(center_freq, bandwidth); + end_freq = cfg80211_get_end_freq(center_freq, bandwidth); + + for (freq = start_freq; freq <= end_freq; freq += 20) { + c = ieee80211_get_channel(wiphy, freq); + if (!c) + return 0; + + if (c->flags & IEEE80211_CHAN_DISABLED) + return 0; + + if (!(c->flags & IEEE80211_CHAN_RADAR)) + continue; + + if (c->dfs_cac_ms > dfs_cac_ms) + dfs_cac_ms = c->dfs_cac_ms; + } + + return dfs_cac_ms; +} + +unsigned int +cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef) +{ + int width; + unsigned int t1 = 0, t2 = 0; + + if (WARN_ON(!cfg80211_chandef_valid(chandef))) + return 0; + + width = cfg80211_chandef_get_width(chandef); + if (width < 0) + return 0; + + t1 = cfg80211_get_chans_dfs_cac_time(wiphy, + chandef->center_freq1, + width); + + if (!chandef->center_freq2) + return t1; + + t2 = cfg80211_get_chans_dfs_cac_time(wiphy, + chandef->center_freq2, + width); + + return max(t1, t2); +} static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, u32 center_freq, u32 bandwidth, diff --git a/net/wireless/core.h b/net/wireless/core.h index 40683004d52..64fde38c1a7 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -402,6 +402,9 @@ void cfg80211_set_dfs_state(struct wiphy *wiphy, void cfg80211_dfs_channels_update_work(struct work_struct *work); +unsigned int +cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef); static inline int cfg80211_can_change_interface(struct cfg80211_registered_device *rdev, diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index d47c9d127b1..c52ff59a3e9 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -778,7 +778,7 @@ void cfg80211_cac_event(struct net_device *netdev, switch (event) { case NL80211_RADAR_CAC_FINISHED: timeout = wdev->cac_start_time + - msecs_to_jiffies(IEEE80211_DFS_MIN_CAC_TIME_MS); + msecs_to_jiffies(wdev->cac_time_ms); WARN_ON(!time_after_eq(jiffies, timeout)); cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); break; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 9f7ebf94a05..8fa02a3fa7f 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5779,6 +5779,7 @@ static int nl80211_start_radar_detection(struct sk_buff *skb, struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_chan_def chandef; enum nl80211_dfs_regions dfs_region; + unsigned int cac_time_ms; int err; dfs_region = reg_get_dfs_region(wdev->wiphy); @@ -5814,11 +5815,17 @@ static int nl80211_start_radar_detection(struct sk_buff *skb, if (err) return err; - err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef); + cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef); + if (WARN_ON(!cac_time_ms)) + cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; + + err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef, + cac_time_ms); if (!err) { wdev->chandef = chandef; wdev->cac_started = true; wdev->cac_start_time = jiffies; + wdev->cac_time_ms = cac_time_ms; } return err; } -- cgit v1.2.3-70-g09d2 From a0f995a561d90636120bce2e89157b537a174c92 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Thu, 13 Mar 2014 14:30:47 +0200 Subject: mac80211: add status_driver_data array to ieee80211_tx_info Drivers might want to have private data in addition to all other ieee80211_tx_info.status fields. The current ieee80211_tx_info.rate_driver_data overlaps with some of the non-rate data (e.g. ampdu_ack_len), so it might not be good enough. Since we already know how much free bytes remained, simply use this size to define (void *) array. While on it, change ack_signal type from int to the more explicit s32 type. Signed-off-by: Eliad Peller Signed-off-by: Johannes Berg --- include/net/mac80211.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/net') diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 86faa413b37..f6988fe8dfd 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -697,11 +697,11 @@ struct ieee80211_tx_info { } control; struct { struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; - int ack_signal; + s32 ack_signal; u8 ampdu_ack_len; u8 ampdu_len; u8 antenna; - /* 21 bytes free */ + void *status_driver_data[21 / sizeof(void *)]; } status; struct { struct ieee80211_tx_rate driver_rates[ -- cgit v1.2.3-70-g09d2 From 3afc2167f60a327a2c1e1e2600ef209a3c2b75b7 Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Tue, 4 Mar 2014 16:50:13 +0200 Subject: cfg80211/mac80211: ignore signal if the frame was heard on wrong channel On 2.4Ghz band, the channels overlap since the delta between different channels is 5Mhz while the width of the receiver is 20Mhz (at least). This means that we can hear beacons or probe responses from adjacent channels. These frames will have a significant lower RSSI which will feed all kinds of logic with inaccurate data. An obvious example is the roaming algorithm that will think our AP is getting weak and will try to move to another AP. In order to avoid this, update the signal only if the frame has been heard on the same channel as the one advertised by the AP in its DS / HT IEs. We refrain from updating the values only if the AP is already in the BSS list so that we will still have a valid (but inaccurate) value if the AP was heard on an adjacent channel only. To achieve this, stop taking the channel from DS / HT IEs in mac80211. The DS / HT IEs is taken into account to discard the frame if it was received on a disabled channel. This can happen due to the same phenomenon: the frame is sent on channel 12, but heard on channel 11 while channel 12 can be disabled on certain devices. Since this check is done in cfg80211, stop even checking this in mac80211. Signed-off-by: Emmanuel Grumbach [remove unused rx_freq variable] Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 16 ++++++++-------- net/mac80211/ibss.c | 12 ++---------- net/mac80211/mlme.c | 12 ++---------- net/wireless/scan.c | 28 +++++++++++++++++++--------- 4 files changed, 31 insertions(+), 37 deletions(-) (limited to 'include/net') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index ff3af16eba2..f3539a15c41 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -3672,7 +3672,7 @@ void cfg80211_sched_scan_stopped(struct wiphy *wiphy); * cfg80211_inform_bss_width_frame - inform cfg80211 of a received BSS frame * * @wiphy: the wiphy reporting the BSS - * @channel: The channel the frame was received on + * @rx_channel: The channel the frame was received on * @scan_width: width of the control channel * @mgmt: the management frame (probe response or beacon) * @len: length of the management frame @@ -3687,18 +3687,18 @@ void cfg80211_sched_scan_stopped(struct wiphy *wiphy); */ struct cfg80211_bss * __must_check cfg80211_inform_bss_width_frame(struct wiphy *wiphy, - struct ieee80211_channel *channel, + struct ieee80211_channel *rx_channel, enum nl80211_bss_scan_width scan_width, struct ieee80211_mgmt *mgmt, size_t len, s32 signal, gfp_t gfp); static inline struct cfg80211_bss * __must_check cfg80211_inform_bss_frame(struct wiphy *wiphy, - struct ieee80211_channel *channel, + struct ieee80211_channel *rx_channel, struct ieee80211_mgmt *mgmt, size_t len, s32 signal, gfp_t gfp) { - return cfg80211_inform_bss_width_frame(wiphy, channel, + return cfg80211_inform_bss_width_frame(wiphy, rx_channel, NL80211_BSS_CHAN_WIDTH_20, mgmt, len, signal, gfp); } @@ -3707,7 +3707,7 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, * cfg80211_inform_bss - inform cfg80211 of a new BSS * * @wiphy: the wiphy reporting the BSS - * @channel: The channel the frame was received on + * @rx_channel: The channel the frame was received on * @scan_width: width of the control channel * @bssid: the BSSID of the BSS * @tsf: the TSF sent by the peer in the beacon/probe response (or 0) @@ -3726,7 +3726,7 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, */ struct cfg80211_bss * __must_check cfg80211_inform_bss_width(struct wiphy *wiphy, - struct ieee80211_channel *channel, + struct ieee80211_channel *rx_channel, enum nl80211_bss_scan_width scan_width, const u8 *bssid, u64 tsf, u16 capability, u16 beacon_interval, const u8 *ie, size_t ielen, @@ -3734,12 +3734,12 @@ cfg80211_inform_bss_width(struct wiphy *wiphy, static inline struct cfg80211_bss * __must_check cfg80211_inform_bss(struct wiphy *wiphy, - struct ieee80211_channel *channel, + struct ieee80211_channel *rx_channel, const u8 *bssid, u64 tsf, u16 capability, u16 beacon_interval, const u8 *ie, size_t ielen, s32 signal, gfp_t gfp) { - return cfg80211_inform_bss_width(wiphy, channel, + return cfg80211_inform_bss_width(wiphy, rx_channel, NL80211_BSS_CHAN_WIDTH_20, bssid, tsf, capability, beacon_interval, ie, ielen, signal, diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index e458ca0dffe..06d28787945 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -991,7 +991,6 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, struct ieee802_11_elems *elems) { struct ieee80211_local *local = sdata->local; - int freq; struct cfg80211_bss *cbss; struct ieee80211_bss *bss; struct sta_info *sta; @@ -1003,15 +1002,8 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; bool rates_updated = false; - if (elems->ds_params) - freq = ieee80211_channel_to_frequency(elems->ds_params[0], - band); - else - freq = rx_status->freq; - - channel = ieee80211_get_channel(local->hw.wiphy, freq); - - if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) + channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); + if (!channel) return; if (sdata->vif.type == NL80211_IFTYPE_ADHOC && diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 6d24e6c8f32..bbc2175e4bf 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2760,21 +2760,13 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, struct ieee802_11_elems *elems) { struct ieee80211_local *local = sdata->local; - int freq; struct ieee80211_bss *bss; struct ieee80211_channel *channel; sdata_assert_lock(sdata); - if (elems->ds_params) - freq = ieee80211_channel_to_frequency(elems->ds_params[0], - rx_status->band); - else - freq = rx_status->freq; - - channel = ieee80211_get_channel(local->hw.wiphy, freq); - - if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) + channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq); + if (!channel) return; bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems, diff --git a/net/wireless/scan.c b/net/wireless/scan.c index d1ed4aebbbb..7d9f5264a63 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -680,7 +680,8 @@ static bool cfg80211_combine_bsses(struct cfg80211_registered_device *dev, /* Returned bss is reference counted and must be cleaned up appropriately. */ static struct cfg80211_internal_bss * cfg80211_bss_update(struct cfg80211_registered_device *dev, - struct cfg80211_internal_bss *tmp) + struct cfg80211_internal_bss *tmp, + bool signal_valid) { struct cfg80211_internal_bss *found = NULL; @@ -765,7 +766,12 @@ cfg80211_bss_update(struct cfg80211_registered_device *dev, } found->pub.beacon_interval = tmp->pub.beacon_interval; - found->pub.signal = tmp->pub.signal; + /* + * don't update the signal if beacon was heard on + * adjacent channel. + */ + if (signal_valid) + found->pub.signal = tmp->pub.signal; found->pub.capability = tmp->pub.capability; found->ts = tmp->ts; } else { @@ -869,13 +875,14 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, /* Returned bss is reference counted and must be cleaned up appropriately. */ struct cfg80211_bss* cfg80211_inform_bss_width(struct wiphy *wiphy, - struct ieee80211_channel *channel, + struct ieee80211_channel *rx_channel, enum nl80211_bss_scan_width scan_width, const u8 *bssid, u64 tsf, u16 capability, u16 beacon_interval, const u8 *ie, size_t ielen, s32 signal, gfp_t gfp) { struct cfg80211_bss_ies *ies; + struct ieee80211_channel *channel; struct cfg80211_internal_bss tmp = {}, *res; if (WARN_ON(!wiphy)) @@ -885,7 +892,7 @@ cfg80211_inform_bss_width(struct wiphy *wiphy, (signal < 0 || signal > 100))) return NULL; - channel = cfg80211_get_bss_channel(wiphy, ie, ielen, channel); + channel = cfg80211_get_bss_channel(wiphy, ie, ielen, rx_channel); if (!channel) return NULL; @@ -913,7 +920,8 @@ cfg80211_inform_bss_width(struct wiphy *wiphy, rcu_assign_pointer(tmp.pub.beacon_ies, ies); rcu_assign_pointer(tmp.pub.ies, ies); - res = cfg80211_bss_update(wiphy_to_dev(wiphy), &tmp); + res = cfg80211_bss_update(wiphy_to_dev(wiphy), &tmp, + rx_channel == channel); if (!res) return NULL; @@ -929,20 +937,21 @@ EXPORT_SYMBOL(cfg80211_inform_bss_width); /* Returned bss is reference counted and must be cleaned up appropriately. */ struct cfg80211_bss * cfg80211_inform_bss_width_frame(struct wiphy *wiphy, - struct ieee80211_channel *channel, + struct ieee80211_channel *rx_channel, enum nl80211_bss_scan_width scan_width, struct ieee80211_mgmt *mgmt, size_t len, s32 signal, gfp_t gfp) { struct cfg80211_internal_bss tmp = {}, *res; struct cfg80211_bss_ies *ies; + struct ieee80211_channel *channel; size_t ielen = len - offsetof(struct ieee80211_mgmt, u.probe_resp.variable); BUILD_BUG_ON(offsetof(struct ieee80211_mgmt, u.probe_resp.variable) != offsetof(struct ieee80211_mgmt, u.beacon.variable)); - trace_cfg80211_inform_bss_width_frame(wiphy, channel, scan_width, mgmt, + trace_cfg80211_inform_bss_width_frame(wiphy, rx_channel, scan_width, mgmt, len, signal); if (WARN_ON(!mgmt)) @@ -959,7 +968,7 @@ cfg80211_inform_bss_width_frame(struct wiphy *wiphy, return NULL; channel = cfg80211_get_bss_channel(wiphy, mgmt->u.beacon.variable, - ielen, channel); + ielen, rx_channel); if (!channel) return NULL; @@ -983,7 +992,8 @@ cfg80211_inform_bss_width_frame(struct wiphy *wiphy, tmp.pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); tmp.pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); - res = cfg80211_bss_update(wiphy_to_dev(wiphy), &tmp); + res = cfg80211_bss_update(wiphy_to_dev(wiphy), &tmp, + rx_channel == channel); if (!res) return NULL; -- cgit v1.2.3-70-g09d2 From fb378c231daf93c7c806848e8247781322867ece Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Tue, 4 Mar 2014 10:35:25 +0200 Subject: mac80211: set beamforming bit in radiotap Add a bit in rx_status.vht_flags to let the low level driver notify mac80211 about a beamformed packet. Propagate this to the radiotap header. Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg --- include/net/mac80211.h | 2 ++ net/mac80211/rx.c | 2 ++ 2 files changed, 4 insertions(+) (limited to 'include/net') diff --git a/include/net/mac80211.h b/include/net/mac80211.h index f6988fe8dfd..2de7ff42ff3 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -877,11 +877,13 @@ enum mac80211_rx_flags { * @RX_VHT_FLAG_80MHZ: 80 MHz was used * @RX_VHT_FLAG_80P80MHZ: 80+80 MHz was used * @RX_VHT_FLAG_160MHZ: 160 MHz was used + * @RX_VHT_FLAG_BF: packet was beamformed */ enum mac80211_rx_vht_flags { RX_VHT_FLAG_80MHZ = BIT(0), RX_VHT_FLAG_80P80MHZ = BIT(1), RX_VHT_FLAG_160MHZ = BIT(2), + RX_VHT_FLAG_BF = BIT(3), }; /** diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index f3719e66989..ac8322818b2 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -333,6 +333,8 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local, /* in VHT, STBC is binary */ if (status->flag & RX_FLAG_STBC_MASK) *pos |= IEEE80211_RADIOTAP_VHT_FLAG_STBC; + if (status->vht_flag & RX_VHT_FLAG_BF) + *pos |= IEEE80211_RADIOTAP_VHT_FLAG_BEAMFORMED; pos++; /* bandwidth */ if (status->vht_flag & RX_VHT_FLAG_80MHZ) -- cgit v1.2.3-70-g09d2