diff options
| -rw-r--r-- | include/uapi/linux/nl80211.h | 5 | ||||
| -rw-r--r-- | net/wireless/ap.c | 5 | ||||
| -rw-r--r-- | net/wireless/chan.c | 101 | ||||
| -rw-r--r-- | net/wireless/core.h | 10 | ||||
| -rw-r--r-- | net/wireless/ibss.c | 1 | ||||
| -rw-r--r-- | net/wireless/mesh.c | 1 | ||||
| -rw-r--r-- | net/wireless/mlme.c | 40 | ||||
| -rw-r--r-- | net/wireless/reg.c | 28 | ||||
| -rw-r--r-- | net/wireless/reg.h | 14 |
9 files changed, 196 insertions, 9 deletions
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 9a499b15cfbc..cd4dfef58fab 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -4913,12 +4913,17 @@ enum nl80211_smps_mode { * change to the channel status. * @NL80211_RADAR_NOP_FINISHED: The Non-Occupancy Period for this channel is * over, channel becomes usable. + * @NL80211_RADAR_PRE_CAC_EXPIRED: Channel Availability Check done on this + * non-operating channel is expired and no longer valid. New CAC must + * be done on this channel before starting the operation. This is not + * applicable for ETSI dfs domain where pre-CAC is valid for ever. */ enum nl80211_radar_event { NL80211_RADAR_DETECTED, NL80211_RADAR_CAC_FINISHED, NL80211_RADAR_CAC_ABORTED, NL80211_RADAR_NOP_FINISHED, + NL80211_RADAR_PRE_CAC_EXPIRED, }; /** diff --git a/net/wireless/ap.c b/net/wireless/ap.c index bdad1f951561..25666d3009be 100644 --- a/net/wireless/ap.c +++ b/net/wireless/ap.c @@ -32,6 +32,11 @@ int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev, rdev_set_qos_map(rdev, dev, NULL); if (notify) nl80211_send_ap_stopped(wdev); + + /* Should we apply the grace period during beaconing interface + * shutdown also? + */ + cfg80211_sched_dfs_chan_update(rdev); } return err; diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 5497d022fada..099f13c0c39e 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -456,6 +456,107 @@ bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, return (r1 + r2 > 0); } +/* + * Checks if center frequency of chan falls with in the bandwidth + * range of chandef. + */ +bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, + struct ieee80211_channel *chan) +{ + int width; + u32 cf_offset, freq; + + if (chandef->chan->center_freq == chan->center_freq) + return true; + + width = cfg80211_chandef_get_width(chandef); + if (width <= 20) + return false; + + cf_offset = width / 2 - 10; + + for (freq = chandef->center_freq1 - width / 2 + 10; + freq <= chandef->center_freq1 + width / 2 - 10; freq += 20) { + if (chan->center_freq == freq) + return true; + } + + if (!chandef->center_freq2) + return false; + + for (freq = chandef->center_freq2 - width / 2 + 10; + freq <= chandef->center_freq2 + width / 2 - 10; freq += 20) { + if (chan->center_freq == freq) + return true; + } + + return false; +} + +bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev) +{ + bool active = false; + + ASSERT_WDEV_LOCK(wdev); + + if (!wdev->chandef.chan) + return false; + + switch (wdev->iftype) { + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: + active = wdev->beacon_interval != 0; + break; + case NL80211_IFTYPE_ADHOC: + active = wdev->ssid_len != 0; + break; + case NL80211_IFTYPE_MESH_POINT: + active = wdev->mesh_id_len != 0; + break; + case NL80211_IFTYPE_STATION: + case NL80211_IFTYPE_OCB: + case NL80211_IFTYPE_P2P_CLIENT: + case NL80211_IFTYPE_MONITOR: + case NL80211_IFTYPE_AP_VLAN: + case NL80211_IFTYPE_WDS: + case NL80211_IFTYPE_P2P_DEVICE: + /* Can NAN type be considered as beaconing interface? */ + case NL80211_IFTYPE_NAN: + break; + case NL80211_IFTYPE_UNSPECIFIED: + case NUM_NL80211_IFTYPES: + WARN_ON(1); + } + + return active; +} + +bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, + struct ieee80211_channel *chan) +{ + struct wireless_dev *wdev; + + ASSERT_RTNL(); + + if (!(chan->flags & IEEE80211_CHAN_RADAR)) + return false; + + list_for_each_entry(wdev, &wiphy->wdev_list, list) { + wdev_lock(wdev); + if (!cfg80211_beaconing_iface_active(wdev)) { + wdev_unlock(wdev); + continue; + } + + if (cfg80211_is_sub_chan(&wdev->chandef, chan)) { + wdev_unlock(wdev); + return true; + } + wdev_unlock(wdev); + } + + return false; +} static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, u32 center_freq, diff --git a/net/wireless/core.h b/net/wireless/core.h index efa690a7ef8d..519a29ebde5b 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -466,6 +466,16 @@ unsigned int cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, const struct cfg80211_chan_def *chandef); +void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev); + +bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, + struct ieee80211_channel *chan); + +bool cfg80211_beaconing_iface_active(struct wireless_dev *wdev); + +bool cfg80211_is_sub_chan(struct cfg80211_chan_def *chandef, + struct ieee80211_channel *chan); + static inline unsigned int elapsed_jiffies_msecs(unsigned long start) { unsigned long end = jiffies; diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c index 364f900a3dc4..10bf040a0982 100644 --- a/net/wireless/ibss.c +++ b/net/wireless/ibss.c @@ -190,6 +190,7 @@ static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext) if (!nowext) wdev->wext.ibss.ssid_len = 0; #endif + cfg80211_sched_dfs_chan_update(rdev); } void cfg80211_clear_ibss(struct net_device *dev, bool nowext) diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c index 2d8518a37eab..ec0b1c20ac99 100644 --- a/net/wireless/mesh.c +++ b/net/wireless/mesh.c @@ -262,6 +262,7 @@ int __cfg80211_leave_mesh(struct cfg80211_registered_device *rdev, wdev->beacon_interval = 0; memset(&wdev->chandef, 0, sizeof(wdev->chandef)); rdev_set_qos_map(rdev, dev, NULL); + cfg80211_sched_dfs_chan_update(rdev); } return err; diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index 22b3d9990065..cd29366a5206 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -745,6 +745,12 @@ bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm, } EXPORT_SYMBOL(cfg80211_rx_mgmt); +void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev) +{ + cancel_delayed_work(&rdev->dfs_update_channels_wk); + queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0); +} + void cfg80211_dfs_channels_update_work(struct work_struct *work) { struct delayed_work *delayed_work = to_delayed_work(work); @@ -755,6 +761,8 @@ void cfg80211_dfs_channels_update_work(struct work_struct *work) struct wiphy *wiphy; bool check_again = false; unsigned long timeout, next_time = 0; + unsigned long time_dfs_update; + enum nl80211_radar_event radar_event; int bandid, i; rdev = container_of(delayed_work, struct cfg80211_registered_device, @@ -770,11 +778,27 @@ void cfg80211_dfs_channels_update_work(struct work_struct *work) for (i = 0; i < sband->n_channels; i++) { c = &sband->channels[i]; - if (c->dfs_state != NL80211_DFS_UNAVAILABLE) + if (!(c->flags & IEEE80211_CHAN_RADAR)) + continue; + + if (c->dfs_state != NL80211_DFS_UNAVAILABLE && + c->dfs_state != NL80211_DFS_AVAILABLE) continue; - timeout = c->dfs_state_entered + msecs_to_jiffies( - IEEE80211_DFS_MIN_NOP_TIME_MS); + if (c->dfs_state == NL80211_DFS_UNAVAILABLE) { + time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS; + radar_event = NL80211_RADAR_NOP_FINISHED; + } else { + if (regulatory_pre_cac_allowed(wiphy) || + cfg80211_any_wiphy_oper_chan(wiphy, c)) + continue; + + time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS; + radar_event = NL80211_RADAR_PRE_CAC_EXPIRED; + } + + timeout = c->dfs_state_entered + + msecs_to_jiffies(time_dfs_update); if (time_after_eq(jiffies, timeout)) { c->dfs_state = NL80211_DFS_USABLE; @@ -784,8 +808,8 @@ void cfg80211_dfs_channels_update_work(struct work_struct *work) NL80211_CHAN_NO_HT); nl80211_radar_notify(rdev, &chandef, - NL80211_RADAR_NOP_FINISHED, - NULL, GFP_ATOMIC); + radar_event, NULL, + GFP_ATOMIC); continue; } @@ -810,7 +834,6 @@ void cfg80211_radar_event(struct wiphy *wiphy, gfp_t gfp) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); - unsigned long timeout; trace_cfg80211_radar_event(wiphy, chandef); @@ -820,9 +843,7 @@ void cfg80211_radar_event(struct wiphy *wiphy, */ cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE); - timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS); - queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, - timeout); + cfg80211_sched_dfs_chan_update(rdev); nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp); } @@ -851,6 +872,7 @@ void cfg80211_cac_event(struct net_device *netdev, msecs_to_jiffies(wdev->cac_time_ms); WARN_ON(!time_after_eq(jiffies, timeout)); cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); + cfg80211_sched_dfs_chan_update(rdev); break; case NL80211_RADAR_CAC_ABORTED: break; diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 753efcd51fa3..e59b192459e8 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -3120,6 +3120,34 @@ bool regulatory_indoor_allowed(void) return reg_is_indoor; } +bool regulatory_pre_cac_allowed(struct wiphy *wiphy) +{ + const struct ieee80211_regdomain *regd = NULL; + const struct ieee80211_regdomain *wiphy_regd = NULL; + bool pre_cac_allowed = false; + + rcu_read_lock(); + + regd = rcu_dereference(cfg80211_regdomain); + wiphy_regd = rcu_dereference(wiphy->regd); + if (!wiphy_regd) { + if (regd->dfs_region == NL80211_DFS_ETSI) + pre_cac_allowed = true; + + rcu_read_unlock(); + + return pre_cac_allowed; + } + + if (regd->dfs_region == wiphy_regd->dfs_region && + wiphy_regd->dfs_region == NL80211_DFS_ETSI) + pre_cac_allowed = true; + + rcu_read_unlock(); + + return pre_cac_allowed; +} + int __init regulatory_init(void) { int err = 0; diff --git a/net/wireless/reg.h b/net/wireless/reg.h index f6ced316b5a4..ff078f093989 100644 --- a/net/wireless/reg.h +++ b/net/wireless/reg.h @@ -143,4 +143,18 @@ int cfg80211_get_unii(int freq); */ bool regulatory_indoor_allowed(void); +/* + * Grace period to timeout pre-CAC results on the dfs channels. This timeout + * value is used for Non-ETSI domain. + * TODO: May be make this timeout available through regdb? + */ +#define REG_PRE_CAC_EXPIRY_GRACE_MS 2000 + +/** + * regulatory_pre_cac_allowed - if pre-CAC allowed in the current dfs domain + * @wiphy: wiphy for which pre-CAC capability is checked. + + * Pre-CAC is allowed only in ETSI domain. + */ +bool regulatory_pre_cac_allowed(struct wiphy *wiphy); #endif /* __NET_WIRELESS_REG_H */ |