Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 542 insertions, 0 deletions

diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
new file mode 100644
index 00000000..ab057682
--- /dev/null
+++ b/net/mac80211/sta_info.h
@@ -0,0 +1,542 @@
+/*
+ * Copyright 2002-2005, Devicescape Software, Inc.
+ *
+ * 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/etherdevice.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_WME: Station is a QoS-STA.
+ * @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_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.
+ */
+enum ieee80211_sta_info_flags {
+	WLAN_STA_AUTH,
+	WLAN_STA_ASSOC,
+	WLAN_STA_PS_STA,
+	WLAN_STA_AUTHORIZED,
+	WLAN_STA_SHORT_PREAMBLE,
+	WLAN_STA_WME,
+	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_UAPSD,
+	WLAN_STA_SP,
+	WLAN_STA_4ADDR_EVENT,
+	WLAN_STA_INSERTED,
+	WLAN_STA_RATE_CONTROL,
+};
+
+#define STA_TID_NUM 16
+#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
+
+/**
+ * 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
+ * @dialog_token: dialog token for aggregation session
+ * @timeout: session timeout value to be filled in ADDBA requests
+ * @state: session state (see above)
+ * @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
+ *
+ * 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;
+	unsigned long state;
+	u16 timeout;
+	u8 dialog_token;
+	u8 stop_initiator;
+	bool tx_stop;
+	u8 buf_size;
+
+	u16 failed_bar_ssn;
+	bool bar_pending;
+};
+
+/**
+ * struct tid_ampdu_rx - TID aggregation information (Rx).
+ *
+ * @reorder_buf: buffer to reorder incoming aggregated MPDUs
+ * @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.
+ * @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).
+ * @dialog_token: dialog token for aggregation session
+ * @rcu_head: RCU head used for freeing this struct
+ * @reorder_lock: serializes access to reorder buffer, see below.
+ *
+ * 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;
+	struct sk_buff **reorder_buf;
+	unsigned long *reorder_time;
+	struct timer_list session_timer;
+	struct timer_list reorder_timer;
+	u16 head_seq_num;
+	u16 stored_mpdu_num;
+	u16 ssn;
+	u16 buf_size;
+	u16 timeout;
+	u8 dialog_token;
+};
+
+/**
+ * struct sta_ampdu_mlme - STA aggregation information.
+ *
+ * @tid_rx: aggregation info for Rx per TID -- RCU protected
+ * @tid_tx: aggregation info for Tx per TID
+ * @tid_start_tx: sessions where start was requested
+ * @addba_req_num: number of times addBA request has been sent.
+ * @last_addba_req_time: timestamp of the last addBA request.
+ * @dialog_token_allocator: dialog token enumerator for each new session;
+ * @work: work struct for starting/stopping aggregation
+ * @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
+ * @mtx: mutex to protect all TX data (except non-NULL assignments
+ *	to tid_tx[idx], which are protected by the sta spinlock)
+ */
+struct sta_ampdu_mlme {
+	struct mutex mtx;
+	/* rx */
+	struct tid_ampdu_rx __rcu *tid_rx[STA_TID_NUM];
+	unsigned long tid_rx_timer_expired[BITS_TO_LONGS(STA_TID_NUM)];
+	unsigned long tid_rx_stop_requested[BITS_TO_LONGS(STA_TID_NUM)];
+	/* tx */
+	struct work_struct work;
+	struct tid_ampdu_tx __rcu *tid_tx[STA_TID_NUM];
+	struct tid_ampdu_tx *tid_start_tx[STA_TID_NUM];
+	unsigned long last_addba_req_time[STA_TID_NUM];
+	u8 addba_req_num[STA_TID_NUM];
+	u8 dialog_token_allocator;
+};
+
+
+/**
+ * struct sta_info - STA information
+ *
+ * This structure collects information about a station that
+ * mac80211 is communicating with.
+ *
+ * @list: global linked list entry
+ * @hnext: hash table linked list pointer
+ * @local: pointer to the global information
+ * @sdata: virtual interface this station belongs to
+ * @ptk: peer key negotiated with this station, if any
+ * @gtk: group keys negotiated with this station, if any
+ * @rate_ctrl: rate control algorithm reference
+ * @rate_ctrl_priv: rate control private per-STA pointer
+ * @last_tx_rate: rate used for last transmit, to report to userspace as
+ *	"the" transmit rate
+ * @last_rx_rate_idx: rx status rate index of the last data packet
+ * @last_rx_rate_flag: rx status flag of the last data packet
+ * @lock: used for locking all fields that require locking, see comments
+ *	in the header file.
+ * @drv_unblock_wk: used for 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_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
+ * @rx_packets: Number of MSDUs received from this STA
+ * @rx_bytes: Number of bytes received from this STA
+ * @wep_weak_iv_count: number of weak WEP IVs received from this station
+ * @last_rx: time (in jiffies) when last frame was received from this STA
+ * @last_connected: time (in seconds) when a station got connected
+ * @num_duplicates: number of duplicate frames received from this STA
+ * @rx_fragments: number of received MPDUs
+ * @rx_dropped: number of dropped MPDUs from this STA
+ * @last_signal: signal of last received frame from this STA
+ * @avg_signal: moving average of signal of received frames from this STA
+ * @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
+ * @tx_filtered_count: number of frames the hardware filtered for this STA
+ * @tx_retry_failed: number of frames that failed retry
+ * @tx_retry_count: total number of retries for frames to this STA
+ * @fail_avg: moving percentage of failed MSDUs
+ * @tx_packets: number of RX/TX MSDUs
+ * @tx_bytes: number of bytes transmitted to this STA
+ * @tx_fragments: number of transmitted MPDUs
+ * @tid_seq: per-TID sequence numbers for sending to this STA
+ * @ampdu_mlme: A-MPDU state machine state
+ * @timer_to_tid: identity mapping to ID timers
+ * @llid: Local link ID
+ * @plid: Peer link ID
+ * @reason: Cancel reason on PLINK_HOLDING state
+ * @plink_retries: Retries in establishment
+ * @ignore_plink_timer: ignore the peer-link timer (used internally)
+ * @plink_state: peer link state
+ * @plink_timeout: timeout of peer link
+ * @plink_timer: peer link watch timer
+ * @plink_timer_was_running: used by suspend/resume to restore timers
+ * @debugfs: debug filesystem info
+ * @dead: set to true when sta is unlinked
+ * @uploaded: set to true when sta is uploaded to the driver
+ * @lost_packets: number of consecutive lost packets
+ * @sta: station information we share with the driver
+ * @sta_state: duplicates information about station state (for debug)
+ * @beacon_loss_count: number of times beacon loss has triggered
+ */
+struct sta_info {
+	/* General information, mostly static */
+	struct list_head list;
+	struct sta_info __rcu *hnext;
+	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;
+	struct rate_control_ref *rate_ctrl;
+	void *rate_ctrl_priv;
+	spinlock_t lock;
+
+	struct work_struct drv_unblock_wk;
+
+	u16 listen_interval;
+
+	bool dead;
+
+	bool uploaded;
+
+	enum ieee80211_sta_state sta_state;
+
+	/* use the accessors defined below */
+	unsigned long _flags;
+
+	/*
+	 * STA powersave frame queues, no more than the internal
+	 * locking required.
+	 */
+	struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
+	struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
+	unsigned long driver_buffered_tids;
+
+	/* Updated from RX path only, no locking requirements */
+	unsigned long rx_packets, rx_bytes;
+	unsigned long wep_weak_iv_count;
+	unsigned long last_rx;
+	long last_connected;
+	unsigned long num_duplicates;
+	unsigned long rx_fragments;
+	unsigned long rx_dropped;
+	int last_signal;
+	struct ewma avg_signal;
+	/* Plus 1 for non-QoS frames */
+	__le16 last_seq_ctrl[NUM_RX_DATA_QUEUES + 1];
+
+	/* Updated from TX status path only, no locking requirements */
+	unsigned long tx_filtered_count;
+	unsigned long tx_retry_failed, tx_retry_count;
+	/* moving percentage of failed MSDUs */
+	unsigned int fail_avg;
+
+	/* Updated from TX path only, no locking requirements */
+	unsigned long tx_packets;
+	unsigned long tx_bytes;
+	unsigned long tx_fragments;
+	struct ieee80211_tx_rate last_tx_rate;
+	int last_rx_rate_idx;
+	int last_rx_rate_flag;
+	u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
+
+	/*
+	 * Aggregation information, locked with lock.
+	 */
+	struct sta_ampdu_mlme ampdu_mlme;
+	u8 timer_to_tid[STA_TID_NUM];
+
+#ifdef CONFIG_MAC80211_MESH
+	/*
+	 * Mesh peer link attributes
+	 * TODO: move to a sub-structure that is referenced with pointer?
+	 */
+	__le16 llid;
+	__le16 plid;
+	__le16 reason;
+	u8 plink_retries;
+	bool ignore_plink_timer;
+	bool plink_timer_was_running;
+	enum nl80211_plink_state plink_state;
+	u32 plink_timeout;
+	struct timer_list plink_timer;
+#endif
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+	struct sta_info_debugfsdentries {
+		struct dentry *dir;
+		bool add_has_run;
+	} debugfs;
+#endif
+
+	unsigned int lost_packets;
+	unsigned int beacon_loss_count;
+
+	/* 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->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));
+}
+
+#define STA_HASH_SIZE 256
+#define STA_HASH(sta) (sta[5])
+
+
+/* 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)
+
+/*
+ * 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);
+
+static inline
+void for_each_sta_info_type_check(struct ieee80211_local *local,
+				  const u8 *addr,
+				  struct sta_info *sta,
+				  struct sta_info *nxt)
+{
+}
+
+#define for_each_sta_info(local, _addr, _sta, nxt)			\
+	for (	/* initialise loop */					\
+		_sta = rcu_dereference(local->sta_hash[STA_HASH(_addr)]),\
+		nxt = _sta ? rcu_dereference(_sta->hnext) : NULL;	\
+		/* typecheck */						\
+		for_each_sta_info_type_check(local, (_addr), _sta, nxt),\
+		/* continue condition */				\
+		_sta;							\
+		/* advance loop */					\
+		_sta = nxt,						\
+		nxt = _sta ? rcu_dereference(_sta->hnext) : NULL	\
+	     )								\
+	/* compare address and run code only if it matches */		\
+	if (compare_ether_addr(_sta->sta.addr, (_addr)) == 0)
+
+/*
+ * 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);
+
+void sta_info_init(struct ieee80211_local *local);
+void sta_info_stop(struct ieee80211_local *local);
+int sta_info_flush(struct ieee80211_local *local,
+		   struct ieee80211_sub_if_data *sdata);
+void sta_set_rate_info_tx(struct sta_info *sta,
+			  const struct ieee80211_tx_rate *rate,
+			  struct rate_info *rinfo);
+void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
+			  unsigned long exp_time);
+
+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);
+
+#endif /* STA_INFO_H */