Merge tag 'mac80211-next-for-john-2014-08-29' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

Johannes Berg <johannes@sipsolutions.net> says:

"Not that much content this time. Some RCU cleanups, crypto
performance improvements, and various patches all over,
rather than listing them one might as well look into the
git log instead."

Signed-off-by: John W. Linville <linville@tuxdriver.com>

Conflicts:
	drivers/net/wireless/ath/wil6210/wmi.c

4 files changed, 110 insertions, 10 deletions

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 63ab3873..8018c91 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -838,6 +838,16 @@ enum ieee80211_vht_opmode_bits {
 
 #define WLAN_SA_QUERY_TR_ID_LEN 2
 
+/**
+ * struct ieee80211_tpc_report_ie
+ *
+ * This structure refers to "TPC Report element"
+ */
+struct ieee80211_tpc_report_ie {
+	u8 tx_power;
+	u8 link_margin;
+} __packed;
+
 struct ieee80211_mgmt {
 	__le16 frame_control;
 	__le16 duration;
@@ -973,6 +983,13 @@ struct ieee80211_mgmt {
 					u8 action_code;
 					u8 operating_mode;
 				} __packed vht_opmode_notif;
+				struct {
+					u8 action_code;
+					u8 dialog_token;
+					u8 tpc_elem_id;
+					u8 tpc_elem_length;
+					struct ieee80211_tpc_report_ie tpc;
+				} __packed tpc_report;
 			} u;
 		} __packed action;
 	} u;
@@ -1865,6 +1882,7 @@ enum ieee80211_category {
 	WLAN_CATEGORY_DLS = 2,
 	WLAN_CATEGORY_BACK = 3,
 	WLAN_CATEGORY_PUBLIC = 4,
+	WLAN_CATEGORY_RADIO_MEASUREMENT = 5,
 	WLAN_CATEGORY_HT = 7,
 	WLAN_CATEGORY_SA_QUERY = 8,
 	WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION = 9,
@@ -2378,4 +2396,51 @@ static inline bool ieee80211_check_tim(const struct ieee80211_tim_ie *tim,
 #define TU_TO_JIFFIES(x)	(usecs_to_jiffies((x) * 1024))
 #define TU_TO_EXP_TIME(x)	(jiffies + TU_TO_JIFFIES(x))
 
+/**
+ * ieee80211_action_contains_tpc - checks if the frame contains TPC element
+ * @skb: the skb containing the frame, length will be checked
+ *
+ * This function checks if it's either TPC report action frame or Link
+ * Measurement report action frame as defined in IEEE Std. 802.11-2012 8.5.2.5
+ * and 8.5.7.5 accordingly.
+ */
+static inline bool ieee80211_action_contains_tpc(struct sk_buff *skb)
+{
+	struct ieee80211_mgmt *mgmt = (void *)skb->data;
+
+	if (!ieee80211_is_action(mgmt->frame_control))
+		return false;
+
+	if (skb->len < IEEE80211_MIN_ACTION_SIZE +
+		       sizeof(mgmt->u.action.u.tpc_report))
+		return false;
+
+	/*
+	 * TPC report - check that:
+	 * category = 0 (Spectrum Management) or 5 (Radio Measurement)
+	 * spectrum management action = 3 (TPC/Link Measurement report)
+	 * TPC report EID = 35
+	 * TPC report element length = 2
+	 *
+	 * The spectrum management's tpc_report struct is used here both for
+	 * parsing tpc_report and radio measurement's link measurement report
+	 * frame, since the relevant part is identical in both frames.
+	 */
+	if (mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT &&
+	    mgmt->u.action.category != WLAN_CATEGORY_RADIO_MEASUREMENT)
+		return false;
+
+	/* both spectrum mgmt and link measurement have same action code */
+	if (mgmt->u.action.u.tpc_report.action_code !=
+	    WLAN_ACTION_SPCT_TPC_RPRT)
+		return false;
+
+	if (mgmt->u.action.u.tpc_report.tpc_elem_id != WLAN_EID_TPC_REPORT ||
+	    mgmt->u.action.u.tpc_report.tpc_elem_length !=
+	    sizeof(struct ieee80211_tpc_report_ie))
+		return false;
+
+	return true;
+}
+
 #endif /* LINUX_IEEE80211_H */
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 0a080c4..ab21299 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1503,12 +1503,14 @@ enum cfg80211_signal_type {
  * @tsf: TSF contained in the frame that carried these IEs
  * @rcu_head: internal use, for freeing
  * @len: length of the IEs
+ * @from_beacon: these IEs are known to come from a beacon
  * @data: IE data
  */
 struct cfg80211_bss_ies {
 	u64 tsf;
 	struct rcu_head rcu_head;
 	int len;
+	bool from_beacon;
 	u8 data[];
 };
 
@@ -3765,11 +3767,25 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy,
 }
 
 /**
- * cfg80211_inform_bss - inform cfg80211 of a new BSS
+ * enum cfg80211_bss_frame_type - frame type that the BSS data came from
+ * @CFG80211_BSS_FTYPE_UNKNOWN: driver doesn't know whether the data is
+ *	from a beacon or probe response
+ * @CFG80211_BSS_FTYPE_BEACON: data comes from a beacon
+ * @CFG80211_BSS_FTYPE_PRESP: data comes from a probe response
+ */
+enum cfg80211_bss_frame_type {
+	CFG80211_BSS_FTYPE_UNKNOWN,
+	CFG80211_BSS_FTYPE_BEACON,
+	CFG80211_BSS_FTYPE_PRESP,
+};
+
+/**
+ * cfg80211_inform_bss_width - inform cfg80211 of a new BSS
  *
  * @wiphy: the wiphy reporting the BSS
  * @rx_channel: The channel the frame was received on
  * @scan_width: width of the control channel
+ * @ftype: frame type (if known)
  * @bssid: the BSSID of the BSS
  * @tsf: the TSF sent by the peer in the beacon/probe response (or 0)
  * @capability: the capability field sent by the peer
@@ -3789,6 +3805,7 @@ struct cfg80211_bss * __must_check
 cfg80211_inform_bss_width(struct wiphy *wiphy,
 			  struct ieee80211_channel *rx_channel,
 			  enum nl80211_bss_scan_width scan_width,
+			  enum cfg80211_bss_frame_type ftype,
 			  const u8 *bssid, u64 tsf, u16 capability,
 			  u16 beacon_interval, const u8 *ie, size_t ielen,
 			  s32 signal, gfp_t gfp);
@@ -3796,12 +3813,13 @@ cfg80211_inform_bss_width(struct wiphy *wiphy,
 static inline struct cfg80211_bss * __must_check
 cfg80211_inform_bss(struct wiphy *wiphy,
 		    struct ieee80211_channel *rx_channel,
+		    enum cfg80211_bss_frame_type ftype,
 		    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, rx_channel,
-					 NL80211_BSS_CHAN_WIDTH_20,
+					 NL80211_BSS_CHAN_WIDTH_20, ftype,
 					 bssid, tsf, capability,
 					 beacon_interval, ie, ielen, signal,
 					 gfp);
@@ -4412,7 +4430,6 @@ void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
  * @buf: Management frame (header + body)
  * @len: length of the frame data
  * @flags: flags, as defined in enum nl80211_rxmgmt_flags
- * @gfp: context flags
  *
  * This function is called whenever an Action frame is received for a station
  * mode interface, but is not processed in kernel.
@@ -4423,7 +4440,7 @@ void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
  * driver is responsible for rejecting the frame.
  */
 bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_dbm,
-		      const u8 *buf, size_t len, u32 flags, gfp_t gfp);
+		      const u8 *buf, size_t len, u32 flags);
 
 /**
  * cfg80211_mgmt_tx_status - notification of TX status for management frame
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index dae2e24..c9b2bec 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1226,7 +1226,8 @@ struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev);
  *
  * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
  *	driver to indicate that it requires IV generation for this
- *	particular key.
+ *	particular key. Setting this flag does not necessarily mean that SKBs
+ *	will have sufficient tailroom for ICV or MIC.
  * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
  *	the driver for a TKIP key if it requires Michael MIC
  *	generation in software.
@@ -1238,7 +1239,9 @@ struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev);
  * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver
  *	if space should be prepared for the IV, but the IV
  *	itself should not be generated. Do not set together with
- *	@IEEE80211_KEY_FLAG_GENERATE_IV on the same key.
+ *	@IEEE80211_KEY_FLAG_GENERATE_IV on the same key. Setting this flag does
+ *	not necessarily mean that SKBs will have sufficient tailroom for ICV or
+ *	MIC.
  * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received
  *	management frames. The flag can help drivers that have a hardware
  *	crypto implementation that doesn't deal with management frames
@@ -1405,7 +1408,7 @@ struct ieee80211_sta_rates {
  * @supp_rates: Bitmap of supported rates (per band)
  * @ht_cap: HT capabilities of this STA; restricted to our own capabilities
  * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities
- * @wme: indicates whether the STA supports WME. Only valid during AP-mode.
+ * @wme: indicates whether the STA supports QoS/WME.
  * @drv_priv: data area for driver use, will always be aligned to
  *	sizeof(void *), size is determined in hw information.
  * @uapsd_queues: bitmap of queues configured for uapsd. Only valid
@@ -1606,6 +1609,9 @@ struct ieee80211_tx_control {
  *	is not enabled the default action is to disconnect when getting the
  *	CSA frame.
  *
+ * @IEEE80211_HW_SUPPORTS_CLONED_SKBS: The driver will never modify the payload
+ *	or tailroom of TX skbs without copying them first.
+ *
  * @IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS: The HW supports scanning on all bands
  *	in one command, mac80211 doesn't have to run separate scans per band.
  */
@@ -1639,7 +1645,7 @@ enum ieee80211_hw_flags {
 	IEEE80211_HW_TIMING_BEACON_ONLY			= 1<<26,
 	IEEE80211_HW_SUPPORTS_HT_CCK_RATES		= 1<<27,
 	IEEE80211_HW_CHANCTX_STA_CSA			= 1<<28,
-	/* bit 29 unused */
+	IEEE80211_HW_SUPPORTS_CLONED_SKBS		= 1<<29,
 	IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS		= 1<<30,
 };
 
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index f1db15b..d097568 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -3055,14 +3055,20 @@ enum nl80211_bss_scan_width {
  * @NL80211_BSS_BSSID: BSSID of the BSS (6 octets)
  * @NL80211_BSS_FREQUENCY: frequency in MHz (u32)
  * @NL80211_BSS_TSF: TSF of the received probe response/beacon (u64)
+ *	(if @NL80211_BSS_PRESP_DATA is present then this is known to be
+ *	from a probe response, otherwise it may be from the same beacon
+ *	that the NL80211_BSS_BEACON_TSF will be from)
  * @NL80211_BSS_BEACON_INTERVAL: beacon interval of the (I)BSS (u16)
  * @NL80211_BSS_CAPABILITY: capability field (CPU order, u16)
  * @NL80211_BSS_INFORMATION_ELEMENTS: binary attribute containing the
  *	raw information elements from the probe response/beacon (bin);
- *	if the %NL80211_BSS_BEACON_IES attribute is present, the IEs here are
- *	from a Probe Response frame; otherwise they are from a Beacon frame.
+ *	if the %NL80211_BSS_BEACON_IES attribute is present and the data is
+ *	different then the IEs here are from a Probe Response frame; otherwise
+ *	they are from a Beacon frame.
  *	However, if the driver does not indicate the source of the IEs, these
  *	IEs may be from either frame subtype.
+ *	If present, the @NL80211_BSS_PRESP_DATA attribute indicates that the
+ *	data here is known to be from a probe response, without any heuristics.
  * @NL80211_BSS_SIGNAL_MBM: signal strength of probe response/beacon
  *	in mBm (100 * dBm) (s32)
  * @NL80211_BSS_SIGNAL_UNSPEC: signal strength of the probe response/beacon
@@ -3074,6 +3080,10 @@ enum nl80211_bss_scan_width {
  *	yet been received
  * @NL80211_BSS_CHAN_WIDTH: channel width of the control channel
  *	(u32, enum nl80211_bss_scan_width)
+ * @NL80211_BSS_BEACON_TSF: TSF of the last received beacon (u64)
+ *	(not present if no beacon frame has been received yet)
+ * @NL80211_BSS_PRESP_DATA: the data in @NL80211_BSS_INFORMATION_ELEMENTS and
+ *	@NL80211_BSS_TSF is known to be from a probe response (flag attribute)
  * @__NL80211_BSS_AFTER_LAST: internal
  * @NL80211_BSS_MAX: highest BSS attribute
  */
@@ -3091,6 +3101,8 @@ enum nl80211_bss {
 	NL80211_BSS_SEEN_MS_AGO,
 	NL80211_BSS_BEACON_IES,
 	NL80211_BSS_CHAN_WIDTH,
+	NL80211_BSS_BEACON_TSF,
+	NL80211_BSS_PRESP_DATA,
 
 	/* keep last */
 	__NL80211_BSS_AFTER_LAST,