#include <linux/list.h>
#include <linux/types.h>
#include <linux/if_ether.h>
-#include <linux/kref.h>
-#include "ieee80211_key.h"
+#include <linux/workqueue.h>
+#include "key.h"
/**
* enum ieee80211_sta_info_flags - Stations flags
*
* @WLAN_STA_AUTH: Station is authenticated.
* @WLAN_STA_ASSOC: Station is associated.
- * @WLAN_STA_PS: Station is in power-save mode
+ * @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_ASSOC_AP: We're associated to that station, it is an AP.
* @WLAN_STA_WME: Station is a QoS-STA.
* @WLAN_STA_WDS: Station is one of our WDS peers.
- * @WLAN_STA_PSPOLL: Station has just PS-polled us.
* @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
- * IEEE80211_TXCTL_CLEAR_PS_FILT control flag) when the next
+ * 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_SUSPEND: Set/cleared during a suspend/resume cycle.
+ * Used to deny ADDBA requests (both TX and RX).
+ * @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.
*/
enum ieee80211_sta_info_flags {
WLAN_STA_AUTH = 1<<0,
WLAN_STA_ASSOC = 1<<1,
- WLAN_STA_PS = 1<<2,
+ WLAN_STA_PS_STA = 1<<2,
WLAN_STA_AUTHORIZED = 1<<3,
WLAN_STA_SHORT_PREAMBLE = 1<<4,
WLAN_STA_ASSOC_AP = 1<<5,
WLAN_STA_WME = 1<<6,
WLAN_STA_WDS = 1<<7,
- WLAN_STA_PSPOLL = 1<<8,
WLAN_STA_CLEAR_PS_FILT = 1<<9,
+ WLAN_STA_MFP = 1<<10,
+ WLAN_STA_SUSPEND = 1<<11,
+ WLAN_STA_PS_DRIVER = 1<<12,
+ WLAN_STA_PSPOLL = 1<<13,
};
#define STA_TID_NUM 16
/**
* struct tid_ampdu_tx - TID aggregation information (Tx).
*
- * @state: TID's state in session state machine.
- * @dialog_token: dialog token for aggregation session
- * @ssn: Starting Sequence Number expected to be aggregated.
* @addba_resp_timer: timer for peer's response to addba request
- * @addba_req_num: number of times addBA request has been sent.
+ * @pending: pending frames queue -- use sta's spinlock to protect
+ * @ssn: Starting Sequence Number expected to be aggregated.
+ * @dialog_token: dialog token for aggregation session
*/
struct tid_ampdu_tx {
- u8 state;
- u8 dialog_token;
- u16 ssn;
struct timer_list addba_resp_timer;
- u8 addba_req_num;
+ struct sk_buff_head pending;
+ u16 ssn;
+ u8 dialog_token;
};
/**
* struct tid_ampdu_rx - TID aggregation information (Rx).
*
- * @state: TID's state in session state machine.
- * @dialog_token: dialog token for aggregation session
- * @ssn: Starting Sequence Number expected to be aggregated.
- * @buf_size: buffer size for incoming A-MPDUs
- * @timeout: reset timer value.
- * @head_seq_num: head sequence number in reordering buffer.
- * @stored_mpdu_num: number of MPDUs in reordering buffer
* @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)
+ * @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
+ * @shutdown: this session is being shut down due to STA removal
*/
struct tid_ampdu_rx {
- u8 state;
- u8 dialog_token;
+ struct sk_buff **reorder_buf;
+ unsigned long *reorder_time;
+ struct timer_list session_timer;
+ u16 head_seq_num;
+ u16 stored_mpdu_num;
u16 ssn;
u16 buf_size;
u16 timeout;
- u16 head_seq_num;
- u16 stored_mpdu_num;
- struct sk_buff **reorder_buf;
- struct timer_list session_timer;
+ u8 dialog_token;
+ bool shutdown;
+};
+
+/**
+ * enum plink_state - state of a mesh peer link finite state machine
+ *
+ * @PLINK_LISTEN: initial state, considered the implicit state of non existant
+ * mesh peer links
+ * @PLINK_OPN_SNT: mesh plink open frame has been sent to this mesh peer
+ * @PLINK_OPN_RCVD: mesh plink open frame has been received from this mesh peer
+ * @PLINK_CNF_RCVD: mesh plink confirm frame has been received from this mesh
+ * peer
+ * @PLINK_ESTAB: mesh peer link is established
+ * @PLINK_HOLDING: mesh peer link is being closed or cancelled
+ * @PLINK_BLOCKED: all frames transmitted from this mesh plink are discarded
+ */
+enum plink_state {
+ PLINK_LISTEN,
+ PLINK_OPN_SNT,
+ PLINK_OPN_RCVD,
+ PLINK_CNF_RCVD,
+ PLINK_ESTAB,
+ PLINK_HOLDING,
+ PLINK_BLOCKED
};
/**
* struct sta_ampdu_mlme - STA aggregation information.
*
+ * @tid_state_rx: TID's state in Rx session state machine.
* @tid_rx: aggregation info for Rx per TID
+ * @tid_state_tx: TID's state in Tx session state machine.
* @tid_tx: aggregation info for Tx per TID
- * @ampdu_rx: for locking sections in aggregation Rx flow
- * @ampdu_tx: for locking sectionsi in aggregation Tx flow
+ * @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 tid_ampdu_rx tid_rx[STA_TID_NUM];
- struct tid_ampdu_tx tid_tx[STA_TID_NUM];
- spinlock_t ampdu_rx;
- spinlock_t ampdu_tx;
+ /* rx */
+ u8 tid_state_rx[STA_TID_NUM];
+ struct tid_ampdu_rx *tid_rx[STA_TID_NUM];
+ /* tx */
+ u8 tid_state_tx[STA_TID_NUM];
+ struct tid_ampdu_tx *tid_tx[STA_TID_NUM];
+ u8 addba_req_num[STA_TID_NUM];
u8 dialog_token_allocator;
};
+
+/* see __sta_info_unlink */
+#define STA_INFO_PIN_STAT_NORMAL 0
+#define STA_INFO_PIN_STAT_PINNED 1
+#define STA_INFO_PIN_STAT_DESTROY 2
+
+/**
+ * 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
+ * @key: peer key 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
+ * @lock: used for locking all fields that require locking, see comments
+ * in the header file.
+ * @flaglock: spinlock for flags accesses
+ * @drv_unblock_wk: used for driver PS unblocking
+ * @listen_interval: listen interval of this station, when we're acting as AP
+ * @pin_status: used internally for pinning a STA struct into memory
+ * @flags: STA flags, see &enum ieee80211_sta_info_flags
+ * @ps_tx_buf: buffer of frames to transmit to this station
+ * when it leaves power saving state
+ * @tx_filtered: buffer of frames we already tried to transmit
+ * but were filtered by hardware due to STA having entered
+ * power saving state
+ * @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
+ * @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
+ * @last_noise: noise of last received frame 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
+ * @sta: station information we share with the driver
+ * @dead: set to true when sta is unlinked
+ */
struct sta_info {
- struct kref kref;
+ /* General information, mostly static */
struct list_head list;
- struct sta_info *hnext; /* next entry in hash table list */
-
+ struct sta_info *hnext;
struct ieee80211_local *local;
-
- u8 addr[ETH_ALEN];
- u16 aid; /* STA's unique AID (1..2007), 0 = not yet assigned */
- u32 flags; /* WLAN_STA_ */
-
- struct sk_buff_head ps_tx_buf; /* buffer of TX frames for station in
- * power saving state */
- struct sk_buff_head tx_filtered; /* buffer of TX frames that were
- * already given to low-level driver,
- * but were filtered */
- unsigned long rx_packets, tx_packets; /* number of RX/TX MSDUs */
- unsigned long rx_bytes, tx_bytes;
- unsigned long tx_retry_failed, tx_retry_count;
- unsigned long tx_filtered_count;
-
- unsigned int wep_weak_iv_count; /* number of RX frames with weak IV */
-
- unsigned long last_rx;
- /* bitmap of supported rates per band */
- u64 supp_rates[IEEE80211_NUM_BANDS];
- int txrate_idx;
- /* last rates used to send a frame to this STA */
- int last_txrate_idx, last_nonerp_txrate_idx;
-
- struct net_device *dev; /* which net device is this station associated
- * to */
-
+ struct ieee80211_sub_if_data *sdata;
struct ieee80211_key *key;
-
- u32 tx_num_consecutive_failures;
- u32 tx_num_mpdu_ok;
- u32 tx_num_mpdu_fail;
-
struct rate_control_ref *rate_ctrl;
void *rate_ctrl_priv;
+ spinlock_t lock;
+ spinlock_t flaglock;
- /* last received seq/frag number from this STA (per RX queue) */
- __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
- unsigned long num_duplicates; /* number of duplicate frames received
- * from this STA */
- unsigned long tx_fragments; /* number of transmitted MPDUs */
- unsigned long rx_fragments; /* number of received MPDUs */
- unsigned long rx_dropped; /* number of dropped MPDUs from this STA */
-
- int last_rssi; /* RSSI of last received frame from this STA */
- int last_signal; /* signal of last received frame from this STA */
- int last_noise; /* noise of last received frame from this STA */
- int channel_use;
- int channel_use_raw;
-
-#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
- unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
- unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
-#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
+ struct work_struct drv_unblock_wk;
u16 listen_interval;
- struct ieee80211_ht_info ht_info; /* 802.11n HT capabilities
- of this STA */
+ bool dead;
+
+ /*
+ * for use by the internal lifetime management,
+ * see __sta_info_unlink
+ */
+ u8 pin_status;
+
+ /*
+ * frequently updated, locked with own spinlock (flaglock),
+ * use the accessors defined below
+ */
+ u32 flags;
+
+ /*
+ * STA powersave frame queues, no more than the internal
+ * locking required.
+ */
+ struct sk_buff_head ps_tx_buf;
+ struct sk_buff_head tx_filtered;
+
+ /* Updated from RX path only, no locking requirements */
+ unsigned long rx_packets, rx_bytes;
+ unsigned long wep_weak_iv_count;
+ unsigned long last_rx;
+ unsigned long num_duplicates;
+ unsigned long rx_fragments;
+ unsigned long rx_dropped;
+ int last_signal;
+ int last_noise;
+ __le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
+
+ /* 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;
+ 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]; /* convert timer id to tid */
- u8 tid_to_tx_q[STA_TID_NUM]; /* map tid to tx queue */
+ 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 plink_state plink_state;
+ u32 plink_timeout;
+ struct timer_list plink_timer;
+#endif
#ifdef CONFIG_MAC80211_DEBUGFS
struct sta_info_debugfsdentries {
struct dentry *dir;
- struct dentry *flags;
- struct dentry *num_ps_buf_frames;
- struct dentry *inactive_ms;
- struct dentry *last_seq_ctrl;
-#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
- struct dentry *wme_rx_queue;
- struct dentry *wme_tx_queue;
-#endif
- struct dentry *agg_status;
+ bool add_has_run;
} debugfs;
#endif
+
+ /* keep last! */
+ struct ieee80211_sta sta;
};
+static inline enum plink_state sta_plink_state(struct sta_info *sta)
+{
+#ifdef CONFIG_MAC80211_MESH
+ return sta->plink_state;
+#endif
+ return PLINK_LISTEN;
+}
+
+static inline void set_sta_flags(struct sta_info *sta, const u32 flags)
+{
+ unsigned long irqfl;
+
+ spin_lock_irqsave(&sta->flaglock, irqfl);
+ sta->flags |= flags;
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
+}
+
+static inline void clear_sta_flags(struct sta_info *sta, const u32 flags)
+{
+ unsigned long irqfl;
+
+ spin_lock_irqsave(&sta->flaglock, irqfl);
+ sta->flags &= ~flags;
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
+}
+
+static inline u32 test_sta_flags(struct sta_info *sta, const u32 flags)
+{
+ u32 ret;
+ unsigned long irqfl;
+
+ spin_lock_irqsave(&sta->flaglock, irqfl);
+ ret = sta->flags & flags;
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
+
+ return ret;
+}
+
+static inline u32 test_and_clear_sta_flags(struct sta_info *sta,
+ const u32 flags)
+{
+ u32 ret;
+ unsigned long irqfl;
+
+ spin_lock_irqsave(&sta->flaglock, irqfl);
+ ret = sta->flags & flags;
+ sta->flags &= ~flags;
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
+
+ return ret;
+}
+
+static inline u32 get_sta_flags(struct sta_info *sta)
+{
+ u32 ret;
+ unsigned long irqfl;
+
+ spin_lock_irqsave(&sta->flaglock, irqfl);
+ ret = sta->flags;
+ spin_unlock_irqrestore(&sta->flaglock, irqfl);
+
+ return ret;
+}
+
-/* Maximum number of concurrently registered stations */
-#define MAX_STA_COUNT 2007
#define STA_HASH_SIZE 256
#define STA_HASH(sta) (sta[5])
*/
#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
-static inline void __sta_info_get(struct sta_info *sta)
+/*
+ * 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)
{
- kref_get(&sta->kref);
}
-struct sta_info * sta_info_get(struct ieee80211_local *local, u8 *addr);
-void sta_info_put(struct sta_info *sta);
-struct sta_info *sta_info_add(struct ieee80211_local *local,
- struct net_device *dev, u8 *addr, gfp_t gfp);
-void sta_info_remove(struct sta_info *sta);
-void sta_info_free(struct sta_info *sta);
+#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 (memcmp(sta->sta.addr, (_addr), ETH_ALEN) == 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,
+ u8 *addr, gfp_t gfp);
+/*
+ * Insert STA info into hash table/list, returns zero or a
+ * -EEXIST if (if the same MAC address is already present).
+ *
+ * Calling this without RCU protection makes the caller
+ * relinquish its reference to @sta.
+ */
+int sta_info_insert(struct sta_info *sta);
+/*
+ * Unlink a STA info from the hash table/list.
+ * This can NULL the STA pointer if somebody else
+ * has already unlinked it.
+ */
+void sta_info_unlink(struct sta_info **sta);
+
+void sta_info_destroy(struct sta_info *sta);
+void sta_info_set_tim_bit(struct sta_info *sta);
+void sta_info_clear_tim_bit(struct sta_info *sta);
+
void sta_info_init(struct ieee80211_local *local);
int sta_info_start(struct ieee80211_local *local);
void sta_info_stop(struct ieee80211_local *local);
-void sta_info_flush(struct ieee80211_local *local, struct net_device *dev);
+int sta_info_flush(struct ieee80211_local *local,
+ struct ieee80211_sub_if_data *sdata);
+void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
+ unsigned long exp_time);
-void sta_info_set_tim_bit(struct sta_info *sta);
-void sta_info_clear_tim_bit(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);
#endif /* STA_INFO_H */
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