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linuxdebug/net/mac80211/sta_info.h

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2024-07-16 15:50:57 +02:00
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright 2002-2005, Devicescape Software, Inc.
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright(c) 2015-2017 Intel Deutschland GmbH
* Copyright(c) 2020-2022 Intel Corporation
*/
#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
* @WLAN_STA_USES_ENCRYPTION: This station was configured for encryption,
* so drop all packets without a key later.
* @WLAN_STA_DECAP_OFFLOAD: This station uses rx decap offload
*
* @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,
WLAN_STA_USES_ENCRYPTION,
WLAN_STA_DECAP_OFFLOAD,
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
#define HT_AGG_STATE_SENT_ADDBA 8
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,
};
/* Debugfs flags to enable/disable use of RX/TX airtime in scheduler */
#define AIRTIME_USE_TX BIT(0)
#define AIRTIME_USE_RX BIT(1)
struct airtime_info {
u64 rx_airtime;
u64 tx_airtime;
u32 last_active;
s32 deficit;
atomic_t aql_tx_pending; /* Estimated airtime for frames pending */
u32 aql_limit_low;
u32 aql_limit_high;
};
void ieee80211_sta_update_pending_airtime(struct ieee80211_local *local,
struct sta_info *sta, u8 ac,
u16 tx_airtime, bool tx_completed);
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
* @ssn: starting sequence number of the session
*
* 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 ssn;
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)
* @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,
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)
DECLARE_EWMA(mesh_tx_rate_avg, 8, 16)
/**
* 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
* @connected_to_gate: true if mesh STA has a path to a mesh gate
* @connected_to_as: true if mesh STA has a path to a authentication server
* @fail_avg: moving percentage of failed MSDUs
* @tx_rate_avg: moving average of tx bitrate
*/
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;
bool connected_to_gate;
bool connected_to_as;
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;
/* moving average of tx bitrate */
struct ewma_mesh_tx_rate_avg tx_rate_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];
};
/*
* IEEE 802.11-2016 (10.6 "Defragmentation") recommends support for "concurrent
* reception of at least one MSDU per access category per associated STA"
* on APs, or "at least one MSDU per access category" on other interface types.
*
* This limit can be increased by changing this define, at the cost of slower
* frame reassembly and increased memory use while fragments are pending.
*/
#define IEEE80211_FRAGMENT_MAX 4
struct ieee80211_fragment_entry {
struct sk_buff_head skb_list;
unsigned long first_frag_time;
u16 seq;
u16 extra_len;
u16 last_frag;
u8 rx_queue;
u8 check_sequential_pn:1, /* needed for CCMP/GCMP */
is_protected:1;
u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
unsigned int key_color;
};
struct ieee80211_fragment_cache {
struct ieee80211_fragment_entry entries[IEEE80211_FRAGMENT_MAX];
unsigned int next;
};
/*
* 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 link_sta_info - Link STA information
* All link specific sta info are stored here for reference. This can be
* a single entry for non-MLD STA or multiple entries for MLD STA
* @addr: Link MAC address - Can be same as MLD STA mac address and is always
* same for non-MLD STA. This is used as key for searching link STA
* @link_id: Link ID uniquely identifying the link STA. This is 0 for non-MLD
* and set to the corresponding vif LinkId for MLD STA
* @link_hash_node: hash node for rhashtable
* @sta: Points to the STA info
* @gtk: group keys negotiated with this station, if any
* @tx_stats: TX statistics
* @tx_stats.packets: # of packets transmitted
* @tx_stats.bytes: # of bytes in all packets transmitted
* @tx_stats.last_rate: last TX rate
* @tx_stats.msdu: # of transmitted MSDUs per TID
* @rx_stats: RX statistics
* @rx_stats_avg: averaged RX statistics
* @rx_stats_avg.signal: averaged signal
* @rx_stats_avg.chain_signal: averaged per-chain signal
* @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
* @status_stats.filtered: # of filtered frames
* @status_stats.retry_failed: # of frames that failed after retry
* @status_stats.retry_count: # of retries attempted
* @status_stats.lost_packets: # of lost packets
* @status_stats.last_pkt_time: timestamp of last ACKed packet
* @status_stats.msdu_retries: # of MSDU retries
* @status_stats.msdu_failed: # of failed MSDUs
* @status_stats.last_ack: last ack timestamp (jiffies)
* @status_stats.last_ack_signal: last ACK signal
* @status_stats.ack_signal_filled: last ACK signal validity
* @status_stats.avg_ack_signal: average ACK signal
* @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
* taken from HT/VHT capabilities or VHT operating mode notification
* @pub: public (driver visible) link STA data
* TODO Move other link params from sta_info as required for MLD operation
*/
struct link_sta_info {
u8 addr[ETH_ALEN];
u8 link_id;
struct rhlist_head link_hash_node;
struct sta_info *sta;
struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS +
NUM_DEFAULT_MGMT_KEYS +
NUM_DEFAULT_BEACON_KEYS];
struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
/* 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;
/* 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_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;
struct rate_info last_rate_info;
u64 msdu[IEEE80211_NUM_TIDS + 1];
} tx_stats;
enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
struct ieee80211_link_sta *pub;
};
/**
* 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
* @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
* @assoc_at: clock boottime (in ns) of last association
* @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
* @airtime: per-AC struct airtime_info describing airtime statistics for this
* station
* @airtime_weight: station weight for airtime fairness calculation purposes
* @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
* @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.
* @frags: fragment cache
* @cur: storage for aggregation data
* &struct ieee80211_sta points either here or to deflink.agg.
* @deflink: This is the default link STA information, for non MLO STA all link
* specific STA information is accessed through @deflink or through
* link[0] which points to address of @deflink. For MLO Link STA
* the first added link STA will point to deflink.
* @link: reference to Link Sta entries. For Non MLO STA, except 1st link,
* i.e link[0] all links would be assigned to NULL by default and
* would access link information via @deflink or link[0]. For MLO
* STA, first link STA being added will point its link pointer to
* @deflink address and remaining would be allocated and the address
* would be assigned to link[link_id] where link_id is the id assigned
* by the AP.
*/
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 *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;
#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;
u64 assoc_at;
long last_connected;
/* Plus 1 for non-QoS frames */
__le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
struct airtime_info airtime[IEEE80211_NUM_ACS];
u16 airtime_weight;
/*
* Aggregation information, locked with lock.
*/
struct sta_ampdu_mlme ampdu_mlme;
#ifdef CONFIG_MAC80211_DEBUGFS
struct dentry *debugfs_dir;
#endif
struct codel_params cparams;
u8 reserved_tid;
struct cfg80211_chan_def tdls_chandef;
struct ieee80211_fragment_cache frags;
struct ieee80211_sta_aggregates cur;
struct link_sta_info deflink;
struct link_sta_info __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS];
/* 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);
/* user must hold sta_mtx or be in RCU critical section */
struct sta_info *sta_info_get_by_addrs(struct ieee80211_local *local,
const u8 *sta_addr, const u8 *vif_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)
struct rhlist_head *link_sta_info_hash_lookup(struct ieee80211_local *local,
const u8 *addr);
#define for_each_link_sta_info(local, _addr, _sta, _tmp) \
rhl_for_each_entry_rcu(_sta, _tmp, \
link_sta_info_hash_lookup(local, _addr), \
link_hash_node)
struct link_sta_info *
link_sta_info_get_bss(struct ieee80211_sub_if_data *sdata, const u8 *addr);
/*
* 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);
struct sta_info *sta_info_alloc_with_link(struct ieee80211_sub_if_data *sdata,
const u8 *mld_addr,
unsigned int link_id,
const u8 *link_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);
/**
* 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
*/
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);
int ieee80211_sta_allocate_link(struct sta_info *sta, unsigned int link_id);
void ieee80211_sta_free_link(struct sta_info *sta, unsigned int link_id);
int ieee80211_sta_activate_link(struct sta_info *sta, unsigned int link_id);
void ieee80211_sta_remove_link(struct sta_info *sta, unsigned int link_id);
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);
void ieee80211_sta_set_max_amsdu_subframes(struct sta_info *sta,
const u8 *ext_capab,
unsigned int ext_capab_len);
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,
STA_STATS_RATE_TYPE_S1G,
};
#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 */