mac80211: remove dead code, clean up

With mac80211 now always controlled by an external SME,
a lot of code is dead -- SSID, BSSID, channel selection
is always done externally, etc. Additionally, rename
IEEE80211_STA_TKIP_WEP_USED to IEEE80211_STA_DISABLE_11N
and clean up the code a bit.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/cfg.c

@@ -1194,18 +1194,14 @@ static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
 	}
 
 	memcpy(sdata->u.mgd.bssid, req->peer_addr, ETH_ALEN);
-	sdata->u.mgd.flags &= ~IEEE80211_STA_AUTO_BSSID_SEL;
-	sdata->u.mgd.flags |= IEEE80211_STA_BSSID_SET;
 
-	/* TODO: req->chan */
-	sdata->u.mgd.flags |= IEEE80211_STA_AUTO_CHANNEL_SEL;
+	sdata->local->oper_channel = req->chan;
+	ieee80211_hw_config(sdata->local, 0);
 
-	if (req->ssid) {
-		sdata->u.mgd.flags |= IEEE80211_STA_SSID_SET;
-		memcpy(sdata->u.mgd.ssid, req->ssid, req->ssid_len);
-		sdata->u.mgd.ssid_len = req->ssid_len;
-		sdata->u.mgd.flags &= ~IEEE80211_STA_AUTO_SSID_SEL;
-	}
+	if (!req->ssid)
+		return -EINVAL;
+	memcpy(sdata->u.mgd.ssid, req->ssid, req->ssid_len);
+	sdata->u.mgd.ssid_len = req->ssid_len;
 
 	kfree(sdata->u.mgd.sme_auth_ie);
 	sdata->u.mgd.sme_auth_ie = NULL;
@@ -1218,7 +1214,6 @@ static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
 		sdata->u.mgd.sme_auth_ie_len = req->ie_len;
 	}
 
-	sdata->u.mgd.flags |= IEEE80211_STA_EXT_SME;
 	sdata->u.mgd.state = IEEE80211_STA_MLME_DIRECT_PROBE;
 	ieee80211_sta_req_auth(sdata);
 	return 0;
@@ -1236,27 +1231,22 @@ static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
 	    !(sdata->u.mgd.flags & IEEE80211_STA_AUTHENTICATED))
 		return -ENOLINK; /* not authenticated */
 
-	sdata->u.mgd.flags &= ~IEEE80211_STA_TKIP_WEP_USED;
+	sdata->u.mgd.flags &= ~IEEE80211_STA_DISABLE_11N;
 
 	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++)
 		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
 		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
 		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104)
-			sdata->u.mgd.flags |= IEEE80211_STA_TKIP_WEP_USED;
+			sdata->u.mgd.flags |= IEEE80211_STA_DISABLE_11N;
 
-	sdata->u.mgd.flags &= ~IEEE80211_STA_AUTO_BSSID_SEL;
-	sdata->u.mgd.flags |= IEEE80211_STA_BSSID_SET;
+	sdata->local->oper_channel = req->chan;
+	ieee80211_hw_config(sdata->local, 0);
 
-	/* TODO: req->chan */
-	sdata->u.mgd.flags |= IEEE80211_STA_AUTO_CHANNEL_SEL;
+	if (!req->ssid)
+		return -EINVAL;
 
-	if (req->ssid) {
-		sdata->u.mgd.flags |= IEEE80211_STA_SSID_SET;
-		memcpy(sdata->u.mgd.ssid, req->ssid, req->ssid_len);
-		sdata->u.mgd.ssid_len = req->ssid_len;
-		sdata->u.mgd.flags &= ~IEEE80211_STA_AUTO_SSID_SEL;
-	} else
-		sdata->u.mgd.flags |= IEEE80211_STA_AUTO_SSID_SEL;
+	memcpy(sdata->u.mgd.ssid, req->ssid, req->ssid_len);
+	sdata->u.mgd.ssid_len = req->ssid_len;
 
 	ret = ieee80211_sta_set_extra_ie(sdata, req->ie, req->ie_len);
 	if (ret && ret != -EALREADY)
@@ -1275,7 +1265,6 @@ static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
 	else
 		sdata->u.mgd.flags &= ~IEEE80211_STA_CONTROL_PORT;
 
-	sdata->u.mgd.flags |= IEEE80211_STA_EXT_SME;
 	sdata->u.mgd.state = IEEE80211_STA_MLME_ASSOCIATE;
 	ieee80211_sta_req_auth(sdata);
 	return 0;

net/mac80211/debugfs_netdev.c

@@ -111,9 +111,7 @@ IEEE80211_IF_FILE(auth_transaction, u.mgd.auth_transaction, DEC);
 static ssize_t ieee80211_if_fmt_flags(
 	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
 {
-	return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
-		 sdata->u.mgd.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
-		 sdata->u.mgd.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
+	return scnprintf(buf, buflen, "%s%s%s%s%s\n",
 		 sdata->u.mgd.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
 		 sdata->u.mgd.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
 		 sdata->u.mgd.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",

net/mac80211/ieee80211_i.h

@@ -228,28 +228,24 @@ struct mesh_preq_queue {
 };
 
 /* flags used in struct ieee80211_if_managed.flags */
-#define IEEE80211_STA_SSID_SET		BIT(0)
-#define IEEE80211_STA_BSSID_SET		BIT(1)
-#define IEEE80211_STA_PREV_BSSID_SET	BIT(2)
-#define IEEE80211_STA_AUTHENTICATED	BIT(3)
-#define IEEE80211_STA_ASSOCIATED	BIT(4)
-#define IEEE80211_STA_PROBEREQ_POLL	BIT(5)
-#define IEEE80211_STA_CREATE_IBSS	BIT(6)
-#define IEEE80211_STA_CONTROL_PORT	BIT(7)
-#define IEEE80211_STA_WMM_ENABLED	BIT(8)
-/* hole at 9, please re-use */
-#define IEEE80211_STA_AUTO_SSID_SEL	BIT(10)
-#define IEEE80211_STA_AUTO_BSSID_SEL	BIT(11)
-#define IEEE80211_STA_AUTO_CHANNEL_SEL	BIT(12)
-#define IEEE80211_STA_PRIVACY_INVOKED	BIT(13)
-#define IEEE80211_STA_TKIP_WEP_USED	BIT(14)
-#define IEEE80211_STA_CSA_RECEIVED	BIT(15)
-#define IEEE80211_STA_MFP_ENABLED	BIT(16)
-#define IEEE80211_STA_EXT_SME		BIT(17)
+enum ieee80211_sta_flags {
+	IEEE80211_STA_PREV_BSSID_SET	= BIT(0),
+	IEEE80211_STA_AUTHENTICATED	= BIT(1),
+	IEEE80211_STA_ASSOCIATED	= BIT(2),
+	IEEE80211_STA_PROBEREQ_POLL	= BIT(3),
+	IEEE80211_STA_CONTROL_PORT	= BIT(4),
+	IEEE80211_STA_WMM_ENABLED	= BIT(5),
+	IEEE80211_STA_DISABLE_11N	= BIT(6),
+	IEEE80211_STA_CSA_RECEIVED	= BIT(7),
+	IEEE80211_STA_MFP_ENABLED	= BIT(8),
+};
+
 /* flags for MLME request */
-#define IEEE80211_STA_REQ_SCAN 0
-#define IEEE80211_STA_REQ_AUTH 1
-#define IEEE80211_STA_REQ_RUN  2
+enum ieee80211_sta_request {
+	IEEE80211_STA_REQ_SCAN,
+	IEEE80211_STA_REQ_AUTH,
+	IEEE80211_STA_REQ_RUN,
+};
 
 struct ieee80211_if_managed {
 	struct timer_list timer;
@@ -936,10 +932,6 @@ extern const struct iw_handler_def ieee80211_iw_handler_def;
 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
 ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
 					  struct sk_buff *skb);
-int ieee80211_sta_commit(struct ieee80211_sub_if_data *sdata);
-int ieee80211_sta_set_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t len);
-int ieee80211_sta_get_ssid(struct ieee80211_sub_if_data *sdata, char *ssid, size_t *len);
-int ieee80211_sta_set_bssid(struct ieee80211_sub_if_data *sdata, u8 *bssid);
 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata);
 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);

net/mac80211/iface.c

@@ -486,8 +486,6 @@ static int ieee80211_stop(struct net_device *dev)
 		synchronize_rcu();
 		skb_queue_purge(&sdata->u.mgd.skb_queue);
 
-		sdata->u.mgd.flags &= ~(IEEE80211_STA_PRIVACY_INVOKED |
-					IEEE80211_STA_TKIP_WEP_USED);
 		kfree(sdata->u.mgd.extra_ie);
 		sdata->u.mgd.extra_ie = NULL;
 		sdata->u.mgd.extra_ie_len = 0;