Commit 867d849f authored by Antonio Quartulli's avatar Antonio Quartulli Committed by Johannes Berg
Browse files

cfg80211: export expected throughput through get_station() 



Users may need information about the expected throughput
towards a given peer.
This value is supposed to consider the size overhead
generated by the 802.11 header.

This value is exported in kbps through the get_station() API
by including it into the station_info object.
Moreover, it is sent to user space when replying to the
nl80211 GET_STATION command.

This information will be useful to the batman-adv module
which will use it for its new metric computation.

Signed-off-by: default avatarAntonio Quartulli <antonio@open-mesh.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 922bd80f

include/net/cfg80211.h

+34 −28
Original line number Diff line number Diff line
@@ -873,36 +873,38 @@ int cfg80211_check_station_change(struct wiphy *wiphy, 
 * @STATION_INFO_NONPEER_PM: @nonpeer_pm filled

 * @STATION_INFO_CHAIN_SIGNAL: @chain_signal filled

 * @STATION_INFO_CHAIN_SIGNAL_AVG: @chain_signal_avg filled

 * @STATION_INFO_EXPECTED_THROUGHPUT: @expected_throughput filled

 */

enum station_info_flags {

	STATION_INFO_INACTIVE_TIME	= 1<<0,

	STATION_INFO_RX_BYTES		= 1<<1,

	STATION_INFO_TX_BYTES		= 1<<2,

	STATION_INFO_LLID		= 1<<3,

	STATION_INFO_PLID		= 1<<4,

	STATION_INFO_PLINK_STATE	= 1<<5,

	STATION_INFO_SIGNAL		= 1<<6,

	STATION_INFO_TX_BITRATE		= 1<<7,

	STATION_INFO_RX_PACKETS		= 1<<8,

	STATION_INFO_TX_PACKETS		= 1<<9,

	STATION_INFO_TX_RETRIES		= 1<<10,

	STATION_INFO_TX_FAILED		= 1<<11,

	STATION_INFO_RX_DROP_MISC	= 1<<12,

	STATION_INFO_SIGNAL_AVG		= 1<<13,

	STATION_INFO_RX_BITRATE		= 1<<14,

	STATION_INFO_BSS_PARAM          = 1<<15,

	STATION_INFO_CONNECTED_TIME	= 1<<16,

	STATION_INFO_ASSOC_REQ_IES	= 1<<17,

	STATION_INFO_STA_FLAGS		= 1<<18,

	STATION_INFO_BEACON_LOSS_COUNT	= 1<<19,

	STATION_INFO_T_OFFSET		= 1<<20,

	STATION_INFO_LOCAL_PM		= 1<<21,

	STATION_INFO_PEER_PM		= 1<<22,

	STATION_INFO_NONPEER_PM		= 1<<23,

	STATION_INFO_RX_BYTES64		= 1<<24,

	STATION_INFO_TX_BYTES64		= 1<<25,

	STATION_INFO_CHAIN_SIGNAL	= 1<<26,

	STATION_INFO_CHAIN_SIGNAL_AVG	= 1<<27,

	STATION_INFO_INACTIVE_TIME		= BIT(0),

	STATION_INFO_RX_BYTES			= BIT(1),

	STATION_INFO_TX_BYTES			= BIT(2),

	STATION_INFO_LLID			= BIT(3),

	STATION_INFO_PLID			= BIT(4),

	STATION_INFO_PLINK_STATE		= BIT(5),

	STATION_INFO_SIGNAL			= BIT(6),

	STATION_INFO_TX_BITRATE			= BIT(7),

	STATION_INFO_RX_PACKETS			= BIT(8),

	STATION_INFO_TX_PACKETS			= BIT(9),

	STATION_INFO_TX_RETRIES			= BIT(10),

	STATION_INFO_TX_FAILED			= BIT(11),

	STATION_INFO_RX_DROP_MISC		= BIT(12),

	STATION_INFO_SIGNAL_AVG			= BIT(13),

	STATION_INFO_RX_BITRATE			= BIT(14),

	STATION_INFO_BSS_PARAM			= BIT(15),

	STATION_INFO_CONNECTED_TIME		= BIT(16),

	STATION_INFO_ASSOC_REQ_IES		= BIT(17),

	STATION_INFO_STA_FLAGS			= BIT(18),

	STATION_INFO_BEACON_LOSS_COUNT		= BIT(19),

	STATION_INFO_T_OFFSET			= BIT(20),

	STATION_INFO_LOCAL_PM			= BIT(21),

	STATION_INFO_PEER_PM			= BIT(22),

	STATION_INFO_NONPEER_PM			= BIT(23),

	STATION_INFO_RX_BYTES64			= BIT(24),

	STATION_INFO_TX_BYTES64			= BIT(25),

	STATION_INFO_CHAIN_SIGNAL		= BIT(26),

	STATION_INFO_CHAIN_SIGNAL_AVG		= BIT(27),

	STATION_INFO_EXPECTED_THROUGHPUT	= BIT(28),

};



/**
@@ -1024,6 +1026,8 @@ struct sta_bss_parameters { 
 * @local_pm: local mesh STA power save mode

 * @peer_pm: peer mesh STA power save mode

 * @nonpeer_pm: non-peer mesh STA power save mode

 * @expected_throughput: expected throughput in kbps (including 802.11 headers)

 *	towards this station.

 */

struct station_info {

	u32 filled;
@@ -1062,6 +1066,8 @@ struct station_info { 
	enum nl80211_mesh_power_mode peer_pm;

	enum nl80211_mesh_power_mode nonpeer_pm;



	u32 expected_throughput;



	/*

	 * Note: Add a new enum station_info_flags value for each new field and

	 * use it to check which fields are initialized.

include/uapi/linux/nl80211.h

+3 −0
Original line number Diff line number Diff line
@@ -2199,6 +2199,8 @@ enum nl80211_sta_bss_param { 
 *	Contains a nested array of signal strength attributes (u8, dBm)

 * @NL80211_STA_INFO_CHAIN_SIGNAL_AVG: per-chain signal strength average

 *	Same format as NL80211_STA_INFO_CHAIN_SIGNAL.

 * @NL80211_STA_EXPECTED_THROUGHPUT: expected throughput considering also the

 *	802.11 header (u32, kbps)

 * @__NL80211_STA_INFO_AFTER_LAST: internal

 * @NL80211_STA_INFO_MAX: highest possible station info attribute

 */
@@ -2230,6 +2232,7 @@ enum nl80211_sta_info { 
	NL80211_STA_INFO_TX_BYTES64,

	NL80211_STA_INFO_CHAIN_SIGNAL,

	NL80211_STA_INFO_CHAIN_SIGNAL_AVG,

	NL80211_STA_INFO_EXPECTED_THROUGHPUT,



	/* keep last */

	__NL80211_STA_INFO_AFTER_LAST,

net/wireless/nl80211.c

+4 −0
Original line number Diff line number Diff line
@@ -3650,6 +3650,10 @@ static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq, 
	    nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,

			sinfo->tx_failed))

		goto nla_put_failure;

	if ((sinfo->filled & STATION_INFO_EXPECTED_THROUGHPUT) &&

	    nla_put_u32(msg, NL80211_STA_INFO_EXPECTED_THROUGHPUT,

			sinfo->expected_throughput))

		goto nla_put_failure;

	if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&

	    nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,

			sinfo->beacon_loss_count))

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