X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fmac80211%2Fsta_info.h;h=5534d489f50678826f751d7cf04fbcd2af50f45f;hb=5ed7449a26bf5336ba9828025f54407227e4f379;hp=787124c253af3766e72a76ed607a6dafa14266c3;hpb=d0709a65181beb787ef3f58cfe45536a2bb254c8;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 787124c..5534d48 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -12,7 +12,7 @@ #include #include #include -#include "ieee80211_key.h" +#include "key.h" /** * enum ieee80211_sta_info_flags - Stations flags @@ -32,8 +32,11 @@ * @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). */ enum ieee80211_sta_info_flags { WLAN_STA_AUTH = 1<<0, @@ -46,6 +49,8 @@ enum ieee80211_sta_info_flags { 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 }; #define STA_TID_NUM 16 @@ -67,69 +72,84 @@ enum ieee80211_sta_info_flags { /** * 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 * @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; + 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 { - LISTEN, - OPN_SNT, - OPN_RCVD, - CNF_RCVD, - ESTAB, - HOLDING, - BLOCKED + 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; }; @@ -139,68 +159,75 @@ struct sta_ampdu_mlme { #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 + * @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_qual: qual 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 + * @debugfs: debug filesystem info + * @sta: station information we share with the driver + */ struct sta_info { + /* 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; - /* moving percentage of failed MSDUs */ - unsigned int fail_avg; - - 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; - - /* sub_if_data this sta belongs 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; - - /* 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 */ + spinlock_t lock; + spinlock_t flaglock; u16 listen_interval; @@ -210,24 +237,63 @@ struct sta_info { */ u8 pin_status; - struct ieee80211_ht_info ht_info; /* 802.11n HT capabilities - of this STA */ + /* + * 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_qual; + 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 */ - __le16 llid; /* Local link ID */ - __le16 plid; /* Peer link ID */ - __le16 reason; /* Buffer for cancel reason on HOLDING state */ - u8 plink_retries; /* Retries in establishment */ + /* + * 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; enum plink_state plink_state; u32 plink_timeout; struct timer_list plink_timer; - spinlock_t plink_lock; /* For peer_state reads / updates and other - updates in the structure. Ensures robust - transitions for the peerlink FSM */ #endif #ifdef CONFIG_MAC80211_DEBUGFS @@ -237,13 +303,13 @@ struct sta_info { 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) @@ -251,12 +317,77 @@ static inline enum plink_state sta_plink_state(struct sta_info *sta) #ifdef CONFIG_MAC80211_MESH return sta->plink_state; #endif - return LISTEN; + 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 void set_and_clear_sta_flags(struct sta_info *sta, + const u32 set, const u32 clear) +{ + unsigned long irqfl; + + spin_lock_irqsave(&sta->flaglock, irqfl); + sta->flags |= set; + sta->flags &= ~clear; + 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]) @@ -276,19 +407,26 @@ static inline enum plink_state sta_plink_state(struct sta_info *sta) /* * Get a STA info, must have be under RCU read lock. */ -struct sta_info *sta_info_get(struct ieee80211_local *local, u8 *addr); +struct sta_info *sta_info_get(struct ieee80211_local *local, const u8 *addr); /* * Get STA info by index, BROKEN! */ struct sta_info *sta_info_get_by_idx(struct ieee80211_local *local, int idx, struct net_device *dev); /* - * Add a new STA info, must be under RCU read lock - * because otherwise the returned reference isn't - * necessarily valid long enough. + * 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. */ -struct sta_info *sta_info_add(struct ieee80211_sub_if_data *sdata, - u8 *addr); +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 @@ -303,7 +441,10 @@ 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, +int sta_info_flush(struct ieee80211_local *local, struct ieee80211_sub_if_data *sdata); +void sta_info_flush_delayed(struct ieee80211_sub_if_data *sdata); +void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, + unsigned long exp_time); #endif /* STA_INFO_H */