Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem

9 files changed, 108 insertions, 27 deletions

diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index 16f3c3a7b2c1..9b8cc877eb19 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -504,7 +504,8 @@ cfg80211_get_chan_state(struct wireless_dev *wdev,
         case NL80211_IFTYPE_ADHOC:
                 if (wdev->current_bss) {
                         *chan = wdev->current_bss->pub.channel;
-                        *chanmode = wdev->ibss_fixed
+                        *chanmode = (wdev->ibss_fixed &&
+                                     !wdev->ibss_dfs_possible)
                                   ? CHAN_MODE_SHARED
                                   : CHAN_MODE_EXCLUSIVE;
                         return;
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 403fe29c024d..9d797df56649 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -83,6 +83,8 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
                          struct cfg80211_cached_keys *connkeys)
 {
         struct wireless_dev *wdev = dev->ieee80211_ptr;
+        struct ieee80211_channel *check_chan;
+        u8 radar_detect_width = 0;
         int err;
 
         ASSERT_WDEV_LOCK(wdev);
@@ -114,14 +116,28 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
         wdev->connect_keys = connkeys;
 
         wdev->ibss_fixed = params->channel_fixed;
+        wdev->ibss_dfs_possible = params->userspace_handles_dfs;
 #ifdef CONFIG_CFG80211_WEXT
         wdev->wext.ibss.chandef = params->chandef;
 #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.
+                 */
+                radar_detect_width = BIT(params->chandef.width);
+                check_chan = NULL;
+        }
+
+        err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
+                                           check_chan,
+                                           (params->channel_fixed &&
+                                            !radar_detect_width)
+                                           ? CHAN_MODE_SHARED
+                                           : CHAN_MODE_EXCLUSIVE,
+                                           radar_detect_width);
 
-        err = cfg80211_can_use_chan(rdev, wdev, params->chandef.chan,
-                                    params->channel_fixed
-                                    ? CHAN_MODE_SHARED
-                                    : CHAN_MODE_EXCLUSIVE);
         if (err) {
                 wdev->connect_keys = NULL;
                 return err;
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 8d49c1ce3dea..6a6b1c8e907d 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -707,11 +707,13 @@ void cfg80211_dfs_channels_update_work(struct work_struct *work)
                         if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
                                 continue;
 
-                        timeout = c->dfs_state_entered +
-                                  IEEE80211_DFS_MIN_NOP_TIME_MS;
+                        timeout = c->dfs_state_entered + msecs_to_jiffies(
+                                        IEEE80211_DFS_MIN_NOP_TIME_MS);
 
                         if (time_after_eq(jiffies, timeout)) {
                                 c->dfs_state = NL80211_DFS_USABLE;
+                                c->dfs_state_entered = jiffies;
+
                                 cfg80211_chandef_create(&chandef, c,
                                                         NL80211_CHAN_NO_HT);
 
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index cbbef88a8ebd..a7f4e7902104 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -354,6 +354,9 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_U16 },
         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_U16 },
+        [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
+        [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
+        [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 };
 
 /* policy for the key attributes */
@@ -3896,9 +3899,45 @@ static int nl80211_parse_sta_wme(struct genl_info *info,
         return 0;
 }
 
+static int nl80211_parse_sta_channel_info(struct genl_info *info,
+                                      struct station_parameters *params)
+{
+        if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
+                params->supported_channels =
+                     nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
+                params->supported_channels_len =
+                     nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
+                /*
+                 * Need to include at least one (first channel, number of
+                 * channels) tuple for each subband, and must have proper
+                 * tuples for the rest of the data as well.
+                 */
+                if (params->supported_channels_len < 2)
+                        return -EINVAL;
+                if (params->supported_channels_len % 2)
+                        return -EINVAL;
+        }
+
+        if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
+                params->supported_oper_classes =
+                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
+                params->supported_oper_classes_len =
+                  nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
+                /*
+                 * The value of the Length field of the Supported Operating
+                 * Classes element is between 2 and 253.
+                 */
+                if (params->supported_oper_classes_len < 2 ||
+                    params->supported_oper_classes_len > 253)
+                        return -EINVAL;
+        }
+        return 0;
+}
+
 static int nl80211_set_station_tdls(struct genl_info *info,
                                     struct station_parameters *params)
 {
+        int err;
         /* Dummy STA entry gets updated once the peer capabilities are known */
         if (info->attrs[NL80211_ATTR_PEER_AID])
                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
@@ -3909,6 +3948,10 @@ static int nl80211_set_station_tdls(struct genl_info *info,
                 params->vht_capa =
                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
 
+        err = nl80211_parse_sta_channel_info(info, params);
+        if (err)
+                return err;
+
         return nl80211_parse_sta_wme(info, params);
 }
 
@@ -4089,6 +4132,10 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
                         return -EINVAL;
         }
 
+        err = nl80211_parse_sta_channel_info(info, &params);
+        if (err)
+                return err;
+
         err = nl80211_parse_sta_wme(info, &params);
         if (err)
                 return err;
@@ -5653,6 +5700,7 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
                         return -EINVAL;
                 break;
         case NL80211_IFTYPE_ADHOC:
+        case NL80211_IFTYPE_MESH_POINT:
                 break;
         default:
                 return -EOPNOTSUPP;
@@ -5665,9 +5713,7 @@ static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
                 return -EINVAL;
 
         /* only important for AP, IBSS and mesh create IEs internally */
-        if (need_new_beacon &&
-            (!info->attrs[NL80211_ATTR_CSA_IES] ||
-             !info->attrs[NL80211_ATTR_CSA_C_OFF_BEACON]))
+        if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
                 return -EINVAL;
 
         params.count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
@@ -5722,9 +5768,9 @@ skip_beacons:
         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
                 return -EINVAL;
 
-        /* DFS channels are only supported for AP/P2P GO ... for now. */
         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
-            dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO) {
+            dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO ||
+            dev->ieee80211_ptr->iftype == NL80211_IFTYPE_ADHOC) {
                 err = cfg80211_chandef_dfs_required(wdev->wiphy,
                                                     &params.chandef);
                 if (err < 0) {
@@ -6556,6 +6602,9 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
         ibss.control_port =
                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
 
+        ibss.userspace_handles_dfs =
+                nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
+
         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
         if (err)
                 kfree(connkeys);
@@ -10762,7 +10811,8 @@ void cfg80211_ch_switch_notify(struct net_device *dev,
 
         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
-                    wdev->iftype != NL80211_IFTYPE_ADHOC))
+                    wdev->iftype != NL80211_IFTYPE_ADHOC &&
+                    wdev->iftype != NL80211_IFTYPE_MESH_POINT))
                 goto out;
 
         wdev->channel = chandef->chan;
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index a0ec143ba3dc..7da67fd0b418 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -787,7 +787,6 @@ 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,
                                     const struct ieee80211_reg_rule *reg_rule)
 {
@@ -974,6 +973,13 @@ static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
 }
 #endif
 
+static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
+{
+        if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY &&
+            !(wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY))
+                return true;
+        return false;
+}
 
 static bool ignore_reg_update(struct wiphy *wiphy,
                               enum nl80211_reg_initiator initiator)
@@ -1000,7 +1006,7 @@ static bool ignore_reg_update(struct wiphy *wiphy,
          * wiphy->regd will be set once the device has its own
          * desired regulatory domain set
          */
-        if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd &&
+        if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
             initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
             !is_world_regdom(lr->alpha2)) {
                 REG_DBG_PRINT("Ignoring regulatory request set by %s "
@@ -1706,8 +1712,8 @@ int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
 }
 EXPORT_SYMBOL(regulatory_hint);
 
-void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band,
-                         const u8 *country_ie, u8 country_ie_len)
+void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band,
+                                const u8 *country_ie, u8 country_ie_len)
 {
         char alpha2[2];
         enum environment_cap env = ENVIRON_ANY;
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index af2d5f8a5d82..9677e3c13da9 100644
--- a/net/wireless/reg.h
+++ b/net/wireless/reg.h
@@ -58,7 +58,7 @@ int regulatory_hint_found_beacon(struct wiphy *wiphy,
                                  gfp_t gfp);
 
 /**
- * regulatory_hint_11d - hints a country IE as a regulatory domain
+ * regulatory_hint_country_ie - hints a country IE as a regulatory domain
  * @wiphy: the wireless device giving the hint (used only for reporting
  *      conflicts)
  * @band: the band on which the country IE was received on. This determines
@@ -78,7 +78,7 @@ int regulatory_hint_found_beacon(struct wiphy *wiphy,
  * not observed. For this reason if a triplet is seen with channel
  * information for a band the BSS is not present in it will be ignored.
  */
-void regulatory_hint_11d(struct wiphy *wiphy,
+void regulatory_hint_country_ie(struct wiphy *wiphy,
                          enum ieee80211_band band,
                          const u8 *country_ie,
                          u8 country_ie_len);
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index eeb71480f1af..d4397eba5408 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -254,10 +254,10 @@ void __cfg80211_sched_scan_results(struct work_struct *wk)
         rdev = container_of(wk, struct cfg80211_registered_device,
                             sched_scan_results_wk);
 
-        request = rdev->sched_scan_req;
-
         rtnl_lock();
 
+        request = rdev->sched_scan_req;
+
         /* we don't have sched_scan_req anymore if the scan is stopping */
         if (request) {
                 if (request->flags & NL80211_SCAN_FLAG_FLUSH) {
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 20e86a95dc4e..65f800890d70 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -682,8 +682,8 @@ void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
          * - country_ie + 2, the start of the country ie data, and
          * - and country_ie[1] which is the IE length
          */
-        regulatory_hint_11d(wdev->wiphy, bss->channel->band,
-                            country_ie + 2, country_ie[1]);
+        regulatory_hint_country_ie(wdev->wiphy, bss->channel->band,
+                                   country_ie + 2, country_ie[1]);
         kfree(country_ie);
 }
 
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 3c8be6104ba4..935dea9485da 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1249,7 +1249,7 @@ 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;
+        bool radar_required = false;
         int i, j;
 
         ASSERT_RTNL();
@@ -1264,14 +1264,20 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
         case NL80211_IFTYPE_MESH_POINT:
         case NL80211_IFTYPE_P2P_GO:
         case NL80211_IFTYPE_WDS:
-                radar_required = !!(chan &&
-                                    (chan->flags & IEEE80211_CHAN_RADAR));
+                /* 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:
-                radar_required = false;
                 break;
         case NUM_NL80211_IFTYPES:
         case NL80211_IFTYPE_UNSPECIFIED: