v4.19.13 snapshot.
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
new file mode 100644
index 0000000..9a04327
--- /dev/null
+++ b/net/mac80211/sta_info.h
@@ -0,0 +1,829 @@
+/*
+ * Copyright 2002-2005, Devicescape Software, Inc.
+ * Copyright 2013-2014 Intel Mobile Communications GmbH
+ * Copyright(c) 2015-2017 Intel Deutschland GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef STA_INFO_H
+#define STA_INFO_H
+
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/if_ether.h>
+#include <linux/workqueue.h>
+#include <linux/average.h>
+#include <linux/bitfield.h>
+#include <linux/etherdevice.h>
+#include <linux/rhashtable.h>
+#include <linux/u64_stats_sync.h>
+#include "key.h"
+
+/**
+ * enum ieee80211_sta_info_flags - Stations flags
+ *
+ * These flags are used with &struct sta_info's @flags member, but
+ * only indirectly with set_sta_flag() and friends.
+ *
+ * @WLAN_STA_AUTH: Station is authenticated.
+ * @WLAN_STA_ASSOC: Station is associated.
+ * @WLAN_STA_PS_STA: Station is in power-save mode
+ * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
+ * This bit is always checked so needs to be enabled for all stations
+ * when virtual port control is not in use.
+ * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
+ * frames.
+ * @WLAN_STA_WDS: Station is one of our WDS peers.
+ * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
+ * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
+ * frame to this station is transmitted.
+ * @WLAN_STA_MFP: Management frame protection is used with this STA.
+ * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
+ * during suspend/resume and station removal.
+ * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
+ * power-save mode logically to flush frames that might still
+ * be in the queues
+ * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
+ * station in power-save mode, reply when the driver unblocks.
+ * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
+ * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
+ * packets. This means the link is enabled.
+ * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
+ * station.
+ * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
+ * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
+ * TDLS peer
+ * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
+ * the BSS base channel.
+ * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
+ * keeping station in power-save mode, reply when the driver
+ * unblocks the station.
+ * @WLAN_STA_SP: Station is in a service period, so don't try to
+ * reply to other uAPSD trigger frames or PS-Poll.
+ * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
+ * @WLAN_STA_INSERTED: This station is inserted into the hash table.
+ * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
+ * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
+ * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
+ * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
+ * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
+ * until pending frames are delivered
+ *
+ * @NUM_WLAN_STA_FLAGS: number of defined flags
+ */
+enum ieee80211_sta_info_flags {
+ WLAN_STA_AUTH,
+ WLAN_STA_ASSOC,
+ WLAN_STA_PS_STA,
+ WLAN_STA_AUTHORIZED,
+ WLAN_STA_SHORT_PREAMBLE,
+ WLAN_STA_WDS,
+ WLAN_STA_CLEAR_PS_FILT,
+ WLAN_STA_MFP,
+ WLAN_STA_BLOCK_BA,
+ WLAN_STA_PS_DRIVER,
+ WLAN_STA_PSPOLL,
+ WLAN_STA_TDLS_PEER,
+ WLAN_STA_TDLS_PEER_AUTH,
+ WLAN_STA_TDLS_INITIATOR,
+ WLAN_STA_TDLS_CHAN_SWITCH,
+ WLAN_STA_TDLS_OFF_CHANNEL,
+ WLAN_STA_TDLS_WIDER_BW,
+ WLAN_STA_UAPSD,
+ WLAN_STA_SP,
+ WLAN_STA_4ADDR_EVENT,
+ WLAN_STA_INSERTED,
+ WLAN_STA_RATE_CONTROL,
+ WLAN_STA_TOFFSET_KNOWN,
+ WLAN_STA_MPSP_OWNER,
+ WLAN_STA_MPSP_RECIPIENT,
+ WLAN_STA_PS_DELIVER,
+
+ NUM_WLAN_STA_FLAGS,
+};
+
+#define ADDBA_RESP_INTERVAL HZ
+#define HT_AGG_MAX_RETRIES 15
+#define HT_AGG_BURST_RETRIES 3
+#define HT_AGG_RETRIES_PERIOD (15 * HZ)
+
+#define HT_AGG_STATE_DRV_READY 0
+#define HT_AGG_STATE_RESPONSE_RECEIVED 1
+#define HT_AGG_STATE_OPERATIONAL 2
+#define HT_AGG_STATE_STOPPING 3
+#define HT_AGG_STATE_WANT_START 4
+#define HT_AGG_STATE_WANT_STOP 5
+#define HT_AGG_STATE_START_CB 6
+#define HT_AGG_STATE_STOP_CB 7
+
+DECLARE_EWMA(avg_signal, 10, 8)
+enum ieee80211_agg_stop_reason {
+ AGG_STOP_DECLINED,
+ AGG_STOP_LOCAL_REQUEST,
+ AGG_STOP_PEER_REQUEST,
+ AGG_STOP_DESTROY_STA,
+};
+
+struct sta_info;
+
+/**
+ * struct tid_ampdu_tx - TID aggregation information (Tx).
+ *
+ * @rcu_head: rcu head for freeing structure
+ * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
+ * @addba_resp_timer: timer for peer's response to addba request
+ * @pending: pending frames queue -- use sta's spinlock to protect
+ * @sta: station we are attached to
+ * @dialog_token: dialog token for aggregation session
+ * @timeout: session timeout value to be filled in ADDBA requests
+ * @tid: TID number
+ * @state: session state (see above)
+ * @last_tx: jiffies of last tx activity
+ * @stop_initiator: initiator of a session stop
+ * @tx_stop: TX DelBA frame when stopping
+ * @buf_size: reorder buffer size at receiver
+ * @failed_bar_ssn: ssn of the last failed BAR tx attempt
+ * @bar_pending: BAR needs to be re-sent
+ * @amsdu: support A-MSDU withing A-MDPU
+ *
+ * This structure's lifetime is managed by RCU, assignments to
+ * the array holding it must hold the aggregation mutex.
+ *
+ * The TX path can access it under RCU lock-free if, and
+ * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
+ * set. Otherwise, the TX path must also acquire the spinlock
+ * and re-check the state, see comments in the tx code
+ * touching it.
+ */
+struct tid_ampdu_tx {
+ struct rcu_head rcu_head;
+ struct timer_list session_timer;
+ struct timer_list addba_resp_timer;
+ struct sk_buff_head pending;
+ struct sta_info *sta;
+ unsigned long state;
+ unsigned long last_tx;
+ u16 timeout;
+ u8 dialog_token;
+ u8 stop_initiator;
+ bool tx_stop;
+ u16 buf_size;
+
+ u16 failed_bar_ssn;
+ bool bar_pending;
+ bool amsdu;
+ u8 tid;
+};
+
+/**
+ * struct tid_ampdu_rx - TID aggregation information (Rx).
+ *
+ * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
+ * A-MSDU with individually reported subframes.
+ * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
+ * the reorder buffer that should be ignored when releasing frames
+ * @reorder_time: jiffies when skb was added
+ * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
+ * @reorder_timer: releases expired frames from the reorder buffer.
+ * @sta: station we are attached to
+ * @last_rx: jiffies of last rx activity
+ * @head_seq_num: head sequence number in reordering buffer.
+ * @stored_mpdu_num: number of MPDUs in reordering buffer
+ * @ssn: Starting Sequence Number expected to be aggregated.
+ * @buf_size: buffer size for incoming A-MPDUs
+ * @timeout: reset timer value (in TUs).
+ * @tid: TID number
+ * @rcu_head: RCU head used for freeing this struct
+ * @reorder_lock: serializes access to reorder buffer, see below.
+ * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
+ * and ssn.
+ * @removed: this session is removed (but might have been found due to RCU)
+ * @started: this session has started (head ssn or higher was received)
+ *
+ * This structure's lifetime is managed by RCU, assignments to
+ * the array holding it must hold the aggregation mutex.
+ *
+ * The @reorder_lock is used to protect the members of this
+ * struct, except for @timeout, @buf_size and @dialog_token,
+ * which are constant across the lifetime of the struct (the
+ * dialog token being used only for debugging).
+ */
+struct tid_ampdu_rx {
+ struct rcu_head rcu_head;
+ spinlock_t reorder_lock;
+ u64 reorder_buf_filtered;
+ struct sk_buff_head *reorder_buf;
+ unsigned long *reorder_time;
+ struct sta_info *sta;
+ struct timer_list session_timer;
+ struct timer_list reorder_timer;
+ unsigned long last_rx;
+ u16 head_seq_num;
+ u16 stored_mpdu_num;
+ u16 ssn;
+ u16 buf_size;
+ u16 timeout;
+ u8 tid;
+ u8 auto_seq:1,
+ removed:1,
+ started:1;
+};
+
+/**
+ * struct sta_ampdu_mlme - STA aggregation information.
+ *
+ * @mtx: mutex to protect all TX data (except non-NULL assignments
+ * to tid_tx[idx], which are protected by the sta spinlock)
+ * tid_start_tx is also protected by sta->lock.
+ * @tid_rx: aggregation info for Rx per TID -- RCU protected
+ * @tid_rx_token: dialog tokens for valid aggregation sessions
+ * @tid_rx_timer_expired: bitmap indicating on which TIDs the
+ * RX timer expired until the work for it runs
+ * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the
+ * driver requested to close until the work for it runs
+ * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested
+ * to be treated as started/stopped due to offloading
+ * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
+ * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
+ * unexpected aggregation related frames outside a session
+ * @work: work struct for starting/stopping aggregation
+ * @tid_tx: aggregation info for Tx per TID
+ * @tid_start_tx: sessions where start was requested
+ * @last_addba_req_time: timestamp of the last addBA request.
+ * @addba_req_num: number of times addBA request has been sent.
+ * @dialog_token_allocator: dialog token enumerator for each new session;
+ */
+struct sta_ampdu_mlme {
+ struct mutex mtx;
+ /* rx */
+ struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
+ u8 tid_rx_token[IEEE80211_NUM_TIDS];
+ unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
+ unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
+ unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)];
+ unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
+ unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
+ /* tx */
+ struct work_struct work;
+ struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
+ struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
+ unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
+ u8 addba_req_num[IEEE80211_NUM_TIDS];
+ u8 dialog_token_allocator;
+};
+
+
+/* Value to indicate no TID reservation */
+#define IEEE80211_TID_UNRESERVED 0xff
+
+#define IEEE80211_FAST_XMIT_MAX_IV 18
+
+/**
+ * struct ieee80211_fast_tx - TX fastpath information
+ * @key: key to use for hw crypto
+ * @hdr: the 802.11 header to put with the frame
+ * @hdr_len: actual 802.11 header length
+ * @sa_offs: offset of the SA
+ * @da_offs: offset of the DA
+ * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
+ * @band: band this will be transmitted on, for tx_info
+ * @rcu_head: RCU head to free this struct
+ *
+ * This struct is small enough so that the common case (maximum crypto
+ * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
+ * cache line.
+ */
+struct ieee80211_fast_tx {
+ struct ieee80211_key *key;
+ u8 hdr_len;
+ u8 sa_offs, da_offs, pn_offs;
+ u8 band;
+ u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
+ sizeof(rfc1042_header)] __aligned(2);
+
+ struct rcu_head rcu_head;
+};
+
+/**
+ * struct ieee80211_fast_rx - RX fastpath information
+ * @dev: netdevice for reporting the SKB
+ * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
+ * @vif_addr: interface address
+ * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
+ * @control_port_protocol: control port protocol copied from sdata
+ * @expected_ds_bits: from/to DS bits expected
+ * @icv_len: length of the MIC if present
+ * @key: bool indicating encryption is expected (key is set)
+ * @sta_notify: notify the MLME code (once)
+ * @internal_forward: forward froms internally on AP/VLAN type interfaces
+ * @uses_rss: copy of USES_RSS hw flag
+ * @da_offs: offset of the DA in the header (for header conversion)
+ * @sa_offs: offset of the SA in the header (for header conversion)
+ * @rcu_head: RCU head for freeing this structure
+ */
+struct ieee80211_fast_rx {
+ struct net_device *dev;
+ enum nl80211_iftype vif_type;
+ u8 vif_addr[ETH_ALEN] __aligned(2);
+ u8 rfc1042_hdr[6] __aligned(2);
+ __be16 control_port_protocol;
+ __le16 expected_ds_bits;
+ u8 icv_len;
+ u8 key:1,
+ sta_notify:1,
+ internal_forward:1,
+ uses_rss:1;
+ u8 da_offs, sa_offs;
+
+ struct rcu_head rcu_head;
+};
+
+/* we use only values in the range 0-100, so pick a large precision */
+DECLARE_EWMA(mesh_fail_avg, 20, 8)
+
+/**
+ * struct mesh_sta - mesh STA information
+ * @plink_lock: serialize access to plink fields
+ * @llid: Local link ID
+ * @plid: Peer link ID
+ * @aid: local aid supplied by peer
+ * @reason: Cancel reason on PLINK_HOLDING state
+ * @plink_retries: Retries in establishment
+ * @plink_state: peer link state
+ * @plink_timeout: timeout of peer link
+ * @plink_timer: peer link watch timer
+ * @plink_sta: peer link watch timer's sta_info
+ * @t_offset: timing offset relative to this host
+ * @t_offset_setpoint: reference timing offset of this sta to be used when
+ * calculating clockdrift
+ * @local_pm: local link-specific power save mode
+ * @peer_pm: peer-specific power save mode towards local STA
+ * @nonpeer_pm: STA power save mode towards non-peer neighbors
+ * @processed_beacon: set to true after peer rates and capabilities are
+ * processed
+ * @fail_avg: moving percentage of failed MSDUs
+ */
+struct mesh_sta {
+ struct timer_list plink_timer;
+ struct sta_info *plink_sta;
+
+ s64 t_offset;
+ s64 t_offset_setpoint;
+
+ spinlock_t plink_lock;
+ u16 llid;
+ u16 plid;
+ u16 aid;
+ u16 reason;
+ u8 plink_retries;
+
+ bool processed_beacon;
+
+ enum nl80211_plink_state plink_state;
+ u32 plink_timeout;
+
+ /* mesh power save */
+ enum nl80211_mesh_power_mode local_pm;
+ enum nl80211_mesh_power_mode peer_pm;
+ enum nl80211_mesh_power_mode nonpeer_pm;
+
+ /* moving percentage of failed MSDUs */
+ struct ewma_mesh_fail_avg fail_avg;
+};
+
+DECLARE_EWMA(signal, 10, 8)
+
+struct ieee80211_sta_rx_stats {
+ unsigned long packets;
+ unsigned long last_rx;
+ unsigned long num_duplicates;
+ unsigned long fragments;
+ unsigned long dropped;
+ int last_signal;
+ u8 chains;
+ s8 chain_signal_last[IEEE80211_MAX_CHAINS];
+ u32 last_rate;
+ struct u64_stats_sync syncp;
+ u64 bytes;
+ u64 msdu[IEEE80211_NUM_TIDS + 1];
+};
+
+/*
+ * The bandwidth threshold below which the per-station CoDel parameters will be
+ * scaled to be more lenient (to prevent starvation of slow stations). This
+ * value will be scaled by the number of active stations when it is being
+ * applied.
+ */
+#define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */
+
+/**
+ * struct sta_info - STA information
+ *
+ * This structure collects information about a station that
+ * mac80211 is communicating with.
+ *
+ * @list: global linked list entry
+ * @free_list: list entry for keeping track of stations to free
+ * @hash_node: hash node for rhashtable
+ * @addr: station's MAC address - duplicated from public part to
+ * let the hash table work with just a single cacheline
+ * @local: pointer to the global information
+ * @sdata: virtual interface this station belongs to
+ * @ptk: peer keys negotiated with this station, if any
+ * @ptk_idx: last installed peer key index
+ * @gtk: group keys negotiated with this station, if any
+ * @rate_ctrl: rate control algorithm reference
+ * @rate_ctrl_lock: spinlock used to protect rate control data
+ * (data inside the algorithm, so serializes calls there)
+ * @rate_ctrl_priv: rate control private per-STA pointer
+ * @lock: used for locking all fields that require locking, see comments
+ * in the header file.
+ * @drv_deliver_wk: used for delivering frames after driver PS unblocking
+ * @listen_interval: listen interval of this station, when we're acting as AP
+ * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
+ * @ps_lock: used for powersave (when mac80211 is the AP) related locking
+ * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
+ * when it leaves power saving state or polls
+ * @tx_filtered: buffers (per AC) of frames we already tried to
+ * transmit but were filtered by hardware due to STA having
+ * entered power saving state, these are also delivered to
+ * the station when it leaves powersave or polls for frames
+ * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
+ * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
+ * @last_connected: time (in seconds) when a station got connected
+ * @last_seq_ctrl: last received seq/frag number from this STA (per TID
+ * plus one for non-QoS frames)
+ * @tid_seq: per-TID sequence numbers for sending to this STA
+ * @ampdu_mlme: A-MPDU state machine state
+ * @mesh: mesh STA information
+ * @debugfs_dir: debug filesystem directory dentry
+ * @dead: set to true when sta is unlinked
+ * @removed: set to true when sta is being removed from sta_list
+ * @uploaded: set to true when sta is uploaded to the driver
+ * @sta: station information we share with the driver
+ * @sta_state: duplicates information about station state (for debug)
+ * @rcu_head: RCU head used for freeing this station struct
+ * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
+ * taken from HT/VHT capabilities or VHT operating mode notification
+ * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
+ * AP only.
+ * @cipher_scheme: optional cipher scheme for this station
+ * @cparams: CoDel parameters for this station.
+ * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
+ * @fast_tx: TX fastpath information
+ * @fast_rx: RX fastpath information
+ * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
+ * the BSS one.
+ * @tx_stats: TX statistics
+ * @rx_stats: RX statistics
+ * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
+ * this (by advertising the USES_RSS hw flag)
+ * @status_stats: TX status statistics
+ */
+struct sta_info {
+ /* General information, mostly static */
+ struct list_head list, free_list;
+ struct rcu_head rcu_head;
+ struct rhlist_head hash_node;
+ u8 addr[ETH_ALEN];
+ struct ieee80211_local *local;
+ struct ieee80211_sub_if_data *sdata;
+ struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
+ struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
+ u8 ptk_idx;
+ struct rate_control_ref *rate_ctrl;
+ void *rate_ctrl_priv;
+ spinlock_t rate_ctrl_lock;
+ spinlock_t lock;
+
+ struct ieee80211_fast_tx __rcu *fast_tx;
+ struct ieee80211_fast_rx __rcu *fast_rx;
+ struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
+
+#ifdef CONFIG_MAC80211_MESH
+ struct mesh_sta *mesh;
+#endif
+
+ struct work_struct drv_deliver_wk;
+
+ u16 listen_interval;
+
+ bool dead;
+ bool removed;
+
+ bool uploaded;
+
+ enum ieee80211_sta_state sta_state;
+
+ /* use the accessors defined below */
+ unsigned long _flags;
+
+ /* STA powersave lock and frame queues */
+ spinlock_t ps_lock;
+ struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
+ struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
+ unsigned long driver_buffered_tids;
+ unsigned long txq_buffered_tids;
+
+ long last_connected;
+
+ /* Updated from RX path only, no locking requirements */
+ struct ieee80211_sta_rx_stats rx_stats;
+ struct {
+ struct ewma_signal signal;
+ struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
+ } rx_stats_avg;
+
+ /* Plus 1 for non-QoS frames */
+ __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
+
+ /* Updated from TX status path only, no locking requirements */
+ struct {
+ unsigned long filtered;
+ unsigned long retry_failed, retry_count;
+ unsigned int lost_packets;
+ unsigned long last_tdls_pkt_time;
+ u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
+ u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
+ unsigned long last_ack;
+ s8 last_ack_signal;
+ bool ack_signal_filled;
+ struct ewma_avg_signal avg_ack_signal;
+ } status_stats;
+
+ /* Updated from TX path only, no locking requirements */
+ struct {
+ u64 packets[IEEE80211_NUM_ACS];
+ u64 bytes[IEEE80211_NUM_ACS];
+ struct ieee80211_tx_rate last_rate;
+ u64 msdu[IEEE80211_NUM_TIDS + 1];
+ } tx_stats;
+ u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
+
+ /*
+ * Aggregation information, locked with lock.
+ */
+ struct sta_ampdu_mlme ampdu_mlme;
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+ struct dentry *debugfs_dir;
+#endif
+
+ enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
+
+ enum ieee80211_smps_mode known_smps_mode;
+ const struct ieee80211_cipher_scheme *cipher_scheme;
+
+ struct codel_params cparams;
+
+ u8 reserved_tid;
+
+ struct cfg80211_chan_def tdls_chandef;
+
+ /* keep last! */
+ struct ieee80211_sta sta;
+};
+
+static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
+{
+#ifdef CONFIG_MAC80211_MESH
+ return sta->mesh->plink_state;
+#endif
+ return NL80211_PLINK_LISTEN;
+}
+
+static inline void set_sta_flag(struct sta_info *sta,
+ enum ieee80211_sta_info_flags flag)
+{
+ WARN_ON(flag == WLAN_STA_AUTH ||
+ flag == WLAN_STA_ASSOC ||
+ flag == WLAN_STA_AUTHORIZED);
+ set_bit(flag, &sta->_flags);
+}
+
+static inline void clear_sta_flag(struct sta_info *sta,
+ enum ieee80211_sta_info_flags flag)
+{
+ WARN_ON(flag == WLAN_STA_AUTH ||
+ flag == WLAN_STA_ASSOC ||
+ flag == WLAN_STA_AUTHORIZED);
+ clear_bit(flag, &sta->_flags);
+}
+
+static inline int test_sta_flag(struct sta_info *sta,
+ enum ieee80211_sta_info_flags flag)
+{
+ return test_bit(flag, &sta->_flags);
+}
+
+static inline int test_and_clear_sta_flag(struct sta_info *sta,
+ enum ieee80211_sta_info_flags flag)
+{
+ WARN_ON(flag == WLAN_STA_AUTH ||
+ flag == WLAN_STA_ASSOC ||
+ flag == WLAN_STA_AUTHORIZED);
+ return test_and_clear_bit(flag, &sta->_flags);
+}
+
+static inline int test_and_set_sta_flag(struct sta_info *sta,
+ enum ieee80211_sta_info_flags flag)
+{
+ WARN_ON(flag == WLAN_STA_AUTH ||
+ flag == WLAN_STA_ASSOC ||
+ flag == WLAN_STA_AUTHORIZED);
+ return test_and_set_bit(flag, &sta->_flags);
+}
+
+int sta_info_move_state(struct sta_info *sta,
+ enum ieee80211_sta_state new_state);
+
+static inline void sta_info_pre_move_state(struct sta_info *sta,
+ enum ieee80211_sta_state new_state)
+{
+ int ret;
+
+ WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
+
+ ret = sta_info_move_state(sta, new_state);
+ WARN_ON_ONCE(ret);
+}
+
+
+void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
+ struct tid_ampdu_tx *tid_tx);
+
+static inline struct tid_ampdu_tx *
+rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
+{
+ return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
+ lockdep_is_held(&sta->lock) ||
+ lockdep_is_held(&sta->ampdu_mlme.mtx));
+}
+
+/* Maximum number of frames to buffer per power saving station per AC */
+#define STA_MAX_TX_BUFFER 64
+
+/* Minimum buffered frame expiry time. If STA uses listen interval that is
+ * smaller than this value, the minimum value here is used instead. */
+#define STA_TX_BUFFER_EXPIRE (10 * HZ)
+
+/* How often station data is cleaned up (e.g., expiration of buffered frames)
+ */
+#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
+
+struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
+ const u8 *addr);
+
+/*
+ * Get a STA info, must be under RCU read lock.
+ */
+struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr);
+
+struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr);
+
+#define for_each_sta_info(local, _addr, _sta, _tmp) \
+ rhl_for_each_entry_rcu(_sta, _tmp, \
+ sta_info_hash_lookup(local, _addr), hash_node)
+
+/*
+ * Get STA info by index, BROKEN!
+ */
+struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
+ int idx);
+/*
+ * Create a new STA info, caller owns returned structure
+ * until sta_info_insert().
+ */
+struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr, gfp_t gfp);
+
+void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
+
+/*
+ * Insert STA info into hash table/list, returns zero or a
+ * -EEXIST if (if the same MAC address is already present).
+ *
+ * Calling the non-rcu version makes the caller relinquish,
+ * the _rcu version calls read_lock_rcu() and must be called
+ * without it held.
+ */
+int sta_info_insert(struct sta_info *sta);
+int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
+
+int __must_check __sta_info_destroy(struct sta_info *sta);
+int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr);
+int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
+ const u8 *addr);
+
+void sta_info_recalc_tim(struct sta_info *sta);
+
+int sta_info_init(struct ieee80211_local *local);
+void sta_info_stop(struct ieee80211_local *local);
+
+/**
+ * sta_info_flush - flush matching STA entries from the STA table
+ *
+ * Returns the number of removed STA entries.
+ *
+ * @sdata: sdata to remove all stations from
+ * @vlans: if the given interface is an AP interface, also flush VLANs
+ */
+int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
+
+static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
+{
+ return __sta_info_flush(sdata, false);
+}
+
+void sta_set_rate_info_tx(struct sta_info *sta,
+ const struct ieee80211_tx_rate *rate,
+ struct rate_info *rinfo);
+void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
+ bool tidstats);
+
+u32 sta_get_expected_throughput(struct sta_info *sta);
+
+void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
+ unsigned long exp_time);
+u8 sta_info_tx_streams(struct sta_info *sta);
+
+void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
+void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
+void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
+
+unsigned long ieee80211_sta_last_active(struct sta_info *sta);
+
+enum sta_stats_type {
+ STA_STATS_RATE_TYPE_INVALID = 0,
+ STA_STATS_RATE_TYPE_LEGACY,
+ STA_STATS_RATE_TYPE_HT,
+ STA_STATS_RATE_TYPE_VHT,
+ STA_STATS_RATE_TYPE_HE,
+};
+
+#define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0)
+#define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0)
+#define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4)
+#define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0)
+#define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4)
+#define STA_STATS_FIELD_HE_MCS GENMASK( 3, 0)
+#define STA_STATS_FIELD_HE_NSS GENMASK( 7, 4)
+#define STA_STATS_FIELD_BW GENMASK(11, 8)
+#define STA_STATS_FIELD_SGI GENMASK(12, 12)
+#define STA_STATS_FIELD_TYPE GENMASK(15, 13)
+#define STA_STATS_FIELD_HE_RU GENMASK(18, 16)
+#define STA_STATS_FIELD_HE_GI GENMASK(20, 19)
+#define STA_STATS_FIELD_HE_DCM GENMASK(21, 21)
+
+#define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)
+#define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v)
+
+#define STA_STATS_RATE_INVALID 0
+
+static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)
+{
+ u32 r;
+
+ r = STA_STATS_FIELD(BW, s->bw);
+
+ if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)
+ r |= STA_STATS_FIELD(SGI, 1);
+
+ switch (s->encoding) {
+ case RX_ENC_VHT:
+ r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);
+ r |= STA_STATS_FIELD(VHT_NSS, s->nss);
+ r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);
+ break;
+ case RX_ENC_HT:
+ r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);
+ r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);
+ break;
+ case RX_ENC_LEGACY:
+ r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);
+ r |= STA_STATS_FIELD(LEGACY_BAND, s->band);
+ r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);
+ break;
+ case RX_ENC_HE:
+ r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HE);
+ r |= STA_STATS_FIELD(HE_NSS, s->nss);
+ r |= STA_STATS_FIELD(HE_MCS, s->rate_idx);
+ r |= STA_STATS_FIELD(HE_GI, s->he_gi);
+ r |= STA_STATS_FIELD(HE_RU, s->he_ru);
+ r |= STA_STATS_FIELD(HE_DCM, s->he_dcm);
+ break;
+ default:
+ WARN_ON(1);
+ return STA_STATS_RATE_INVALID;
+ }
+
+ return r;
+}
+
+#endif /* STA_INFO_H */