Commit 693b1bbc authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

mac80211: clean up sta_info and document locking



This patch cleans up the sta_info struct and documents how
each set of variables is locked. Notably, flags locking is
completely missing. It also adds kernel-doc for some (but
not all yet) members of the struct.
Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 73651ee6
......@@ -67,7 +67,7 @@ STA_FILE(last_rssi, last_rssi, D);
STA_FILE(last_signal, last_signal, D);
STA_FILE(last_noise, last_noise, D);
STA_FILE(channel_use, channel_use, D);
STA_FILE(wep_weak_iv_count, wep_weak_iv_count, D);
STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
......
......@@ -139,84 +139,113 @@ 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
* @addr: MAC address of this STA
* @aid: STA's unique AID (1..2007, 0 = not assigned yet),
* only used in AP (and IBSS?) mode
* @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
* @supp_rates: Bitmap of supported rates (per band)
* @ht_info: HT capabilities of this STA
*/
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;
struct ieee80211_ht_info ht_info;
u64 supp_rates[IEEE80211_NUM_BANDS];
u8 addr[ETH_ALEN];
u16 aid;
u16 listen_interval;
/* last received seq/frag number from this STA (per RX queue) */
__le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
/*
* for use by the internal lifetime management,
* see __sta_info_unlink
*/
u8 pin_status;
/* frequently updated information, needs locking? */
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; /* 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;
/* last received seq/frag number from this STA (per RX queue) */
__le16 last_seq_ctrl[NUM_RX_DATA_QUEUES];
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
unsigned int wme_rx_queue[NUM_RX_DATA_QUEUES];
#endif
/* Updated from TX status path only, no locking requirements */
unsigned long tx_filtered_count;
unsigned long tx_retry_failed, tx_retry_count;
/* TODO: update in generic code not rate control? */
u32 tx_num_consecutive_failures;
u32 tx_num_mpdu_ok;
u32 tx_num_mpdu_fail;
/* moving percentage of failed MSDUs */
unsigned int fail_avg;
/* Updated from TX path only, no locking requirements */
unsigned long tx_packets; /* number of RX/TX MSDUs */
unsigned long tx_bytes;
unsigned long tx_fragments; /* number of transmitted MPDUs */
int txrate_idx;
int last_txrate_idx;
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
unsigned int wme_tx_queue[NUM_RX_DATA_QUEUES];
#endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
#endif
u16 listen_interval;
/* Debug counters, no locking doesn't matter */
int channel_use;
int channel_use_raw;
/*
* for use by the internal lifetime management,
* see __sta_info_unlink
* Aggregation information, comes with own locking.
*/
u8 pin_status;
struct ieee80211_ht_info ht_info; /* 802.11n HT capabilities
of this STA */
struct sta_ampdu_mlme ampdu_mlme;
u8 timer_to_tid[STA_TID_NUM]; /* convert timer id to tid */
u8 timer_to_tid[STA_TID_NUM]; /* identity mapping to ID timers */
u8 tid_to_tx_q[STA_TID_NUM]; /* map tid to tx queue */
#ifdef CONFIG_MAC80211_MESH
/* mesh peer link attributes */
/*
* Mesh peer link attributes
* TODO: move to a sub-structure that is referenced with pointer?
*/
__le16 llid; /* Local link ID */
__le16 plid; /* Peer link ID */
__le16 reason; /* Buffer for cancel reason on HOLDING state */
......
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