cfg80211: combine iwfreq implementations

Until now we implemented iwfreq for managed mode, we
needed to keep the implementations separate, but now
that we have all versions implemented we can combine
them and export just one handler.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

7 files changed, 83 insertions, 80 deletions

diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index 5acb8140ee5..7cd9aa79ef5 100644
--- a/net/mac80211/wext.c
+++ b/net/mac80211/wext.c
@@ -27,75 +27,6 @@
 #include "aes_ccm.h"
 
 
-static int ieee80211_ioctl_siwfreq(struct net_device *dev,
-				   struct iw_request_info *info,
-				   struct iw_freq *freq, char *extra)
-{
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_channel *chan;
-
-	if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
-		return cfg80211_ibss_wext_siwfreq(dev, info, freq, extra);
-	else if (sdata->vif.type == NL80211_IFTYPE_STATION)
-		return cfg80211_mgd_wext_siwfreq(dev, info, freq, extra);
-
-	/* freq->e == 0: freq->m = channel; otherwise freq = m * 10^e */
-	if (freq->e == 0) {
-		if (freq->m < 0)
-			return -EINVAL;
-		else
-			chan = ieee80211_get_channel(local->hw.wiphy,
-				ieee80211_channel_to_frequency(freq->m));
-	} else {
-		int i, div = 1000000;
-		for (i = 0; i < freq->e; i++)
-			div /= 10;
-		if (div <= 0)
-			return -EINVAL;
-		chan = ieee80211_get_channel(local->hw.wiphy, freq->m / div);
-	}
-
-	if (!chan)
-		return -EINVAL;
-
-	if (chan->flags & IEEE80211_CHAN_DISABLED)
-		return -EINVAL;
-
-	/*
-	 * no change except maybe auto -> fixed, ignore the HT
-	 * setting so you can fix a channel you're on already
-	 */
-	if (local->oper_channel == chan)
-		return 0;
-
-	local->oper_channel = chan;
-	local->oper_channel_type = NL80211_CHAN_NO_HT;
-	ieee80211_hw_config(local, 0);
-
-	return 0;
-}
-
-
-static int ieee80211_ioctl_giwfreq(struct net_device *dev,
-				   struct iw_request_info *info,
-				   struct iw_freq *freq, char *extra)
-{
-	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
-	if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
-		return cfg80211_ibss_wext_giwfreq(dev, info, freq, extra);
-	else if (sdata->vif.type == NL80211_IFTYPE_STATION)
-		return cfg80211_mgd_wext_giwfreq(dev, info, freq, extra);
-
-	freq->m = local->oper_channel->center_freq;
-	freq->e = 6;
-
-	return 0;
-}
-
-
 static int ieee80211_ioctl_siwessid(struct net_device *dev,
 				    struct iw_request_info *info,
 				    struct iw_point *data, char *ssid)
@@ -173,8 +104,8 @@ static const iw_handler ieee80211_handler[] =
 	(iw_handler) cfg80211_wext_giwname,		/* SIOCGIWNAME */
 	(iw_handler) NULL,				/* SIOCSIWNWID */
 	(iw_handler) NULL,				/* SIOCGIWNWID */
-	(iw_handler) ieee80211_ioctl_siwfreq,		/* SIOCSIWFREQ */
-	(iw_handler) ieee80211_ioctl_giwfreq,		/* SIOCGIWFREQ */
+	(iw_handler) cfg80211_wext_siwfreq,		/* SIOCSIWFREQ */
+	(iw_handler) cfg80211_wext_giwfreq,		/* SIOCGIWFREQ */
 	(iw_handler) cfg80211_wext_siwmode,		/* SIOCSIWMODE */
 	(iw_handler) cfg80211_wext_giwmode,		/* SIOCGIWMODE */
 	(iw_handler) NULL,				/* SIOCSIWSENS */
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 4276b70cd97..6d903c1d721 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -66,6 +66,9 @@ struct cfg80211_registered_device {
 	struct work_struct conn_work;
 	struct work_struct event_work;
 
+	/* current channel */
+	struct ieee80211_channel *channel;
+
 #ifdef CONFIG_CFG80211_DEBUGFS
 	/* Debugfs entries */
 	struct wiphy_debugfsdentries {
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 8b65e212ae4..de9ac49cd90 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -7,6 +7,7 @@
 #include <linux/etherdevice.h>
 #include <linux/if_arp.h>
 #include <net/cfg80211.h>
+#include "wext-compat.h"
 #include "nl80211.h"
 
 
@@ -312,8 +313,6 @@ int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
 
 	return err;
 }
-/* temporary symbol - mark GPL - in the future the handler won't be */
-EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_siwfreq);
 
 int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
 			       struct iw_request_info *info,
@@ -342,8 +341,6 @@ int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
 	/* no channel if not joining */
 	return -EINVAL;
 }
-/* temporary symbol - mark GPL - in the future the handler won't be */
-EXPORT_SYMBOL_GPL(cfg80211_ibss_wext_giwfreq);
 
 int cfg80211_ibss_wext_siwessid(struct net_device *dev,
 				struct iw_request_info *info,
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c951eb2b07d..0cd548267d4 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -757,6 +757,8 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 						channel_type);
 		if (result)
 			goto bad_res;
+
+		rdev->channel = chan;
 	}
 
 	changed = 0;
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index c7351a98e66..fc2e7768967 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -14,6 +14,7 @@
 #include <linux/etherdevice.h>
 #include <net/iw_handler.h>
 #include <net/cfg80211.h>
+#include "wext-compat.h"
 #include "core.h"
 
 int cfg80211_wext_giwname(struct net_device *dev,
@@ -300,7 +301,6 @@ struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy,
 		return ERR_PTR(-EINVAL);
 	return chan;
 }
-EXPORT_SYMBOL_GPL(cfg80211_wext_freq);
 
 int cfg80211_wext_siwrts(struct net_device *dev,
 			 struct iw_request_info *info,
@@ -759,6 +759,58 @@ int cfg80211_wext_giwencode(struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(cfg80211_wext_giwencode);
 
+int cfg80211_wext_siwfreq(struct net_device *dev,
+			  struct iw_request_info *info,
+			  struct iw_freq *freq, char *extra)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
+	struct ieee80211_channel *chan;
+	int err;
+
+	switch (wdev->iftype) {
+	case NL80211_IFTYPE_STATION:
+		return cfg80211_mgd_wext_siwfreq(dev, info, freq, extra);
+	case NL80211_IFTYPE_ADHOC:
+		return cfg80211_ibss_wext_siwfreq(dev, info, freq, extra);
+	default:
+		chan = cfg80211_wext_freq(wdev->wiphy, freq);
+		if (!chan)
+			return -EINVAL;
+		if (IS_ERR(chan))
+			return PTR_ERR(chan);
+		err = rdev->ops->set_channel(wdev->wiphy, chan,
+					     NL80211_CHAN_NO_HT);
+		if (err)
+			return err;
+		rdev->channel = chan;
+		return 0;
+	}
+}
+EXPORT_SYMBOL_GPL(cfg80211_wext_siwfreq);
+
+int cfg80211_wext_giwfreq(struct net_device *dev,
+			  struct iw_request_info *info,
+			  struct iw_freq *freq, char *extra)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
+
+	switch (wdev->iftype) {
+	case NL80211_IFTYPE_STATION:
+		return cfg80211_mgd_wext_giwfreq(dev, info, freq, extra);
+	case NL80211_IFTYPE_ADHOC:
+		return cfg80211_ibss_wext_giwfreq(dev, info, freq, extra);
+	default:
+		if (!rdev->channel)
+			return -EINVAL;
+		freq->m = rdev->channel->center_freq;
+		freq->e = 6;
+		return 0;
+	}
+}
+EXPORT_SYMBOL_GPL(cfg80211_wext_giwfreq);
+
 int cfg80211_wext_siwtxpower(struct net_device *dev,
 			     struct iw_request_info *info,
 			     union iwreq_data *data, char *extra)
diff --git a/net/wireless/wext-compat.h b/net/wireless/wext-compat.h
new file mode 100644
index 00000000000..23a6b5a83f2
--- /dev/null
+++ b/net/wireless/wext-compat.h
@@ -0,0 +1,21 @@
+#ifndef __WEXT_COMPAT
+#define __WEXT_COMPAT
+
+int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
+			       struct iw_request_info *info,
+			       struct iw_freq *freq, char *extra);
+int cfg80211_ibss_wext_giwfreq(struct net_device *dev,
+			       struct iw_request_info *info,
+			       struct iw_freq *freq, char *extra);
+
+int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
+			      struct iw_request_info *info,
+			      struct iw_freq *freq, char *extra);
+int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
+			      struct iw_request_info *info,
+			      struct iw_freq *freq, char *extra);
+
+struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy,
+					     struct iw_freq *freq);
+
+#endif /* __WEXT_COMPAT */
diff --git a/net/wireless/wext-sme.c b/net/wireless/wext-sme.c
index 4c689fd865b..509279a1cfb 100644
--- a/net/wireless/wext-sme.c
+++ b/net/wireless/wext-sme.c
@@ -8,6 +8,7 @@
 #include <linux/etherdevice.h>
 #include <linux/if_arp.h>
 #include <net/cfg80211.h>
+#include "wext-compat.h"
 #include "nl80211.h"
 
 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
@@ -108,8 +109,6 @@ int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
 	cfg80211_unlock_rdev(rdev);
 	return err;
 }
-/* temporary symbol - mark GPL - in the future the handler won't be */
-EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_siwfreq);
 
 int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
 			      struct iw_request_info *info,
@@ -138,8 +137,6 @@ int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
 	/* no channel if not joining */
 	return -EINVAL;
 }
-/* temporary symbol - mark GPL - in the future the handler won't be */
-EXPORT_SYMBOL_GPL(cfg80211_mgd_wext_giwfreq);
 
 int cfg80211_mgd_wext_siwessid(struct net_device *dev,
 			       struct iw_request_info *info,