1 files changed, 304 insertions, 15 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 0ad1f47d2dc7..58d719ddaa60 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -263,6 +263,7 @@ struct ieee80211_vif_chanctx_switch {
  * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed,
  *      note that this is only called when it changes after the channel
  *      context had been assigned.
+ * @BSS_CHANGED_OCB: OCB join status changed
  */
 enum ieee80211_bss_change {
         BSS_CHANGED_ASSOC               = 1<<0,
@@ -287,6 +288,7 @@ enum ieee80211_bss_change {
         BSS_CHANGED_P2P_PS              = 1<<19,
         BSS_CHANGED_BEACON_INFO         = 1<<20,
         BSS_CHANGED_BANDWIDTH           = 1<<21,
+        BSS_CHANGED_OCB                 = 1<<22,
 
         /* when adding here, make sure to change ieee80211_reconfig */
 };
@@ -739,7 +741,8 @@ struct ieee80211_tx_info {
                         u8 ampdu_ack_len;
                         u8 ampdu_len;
                         u8 antenna;
-                        void *status_driver_data[21 / sizeof(void *)];
+                        u16 tx_time;
+                        void *status_driver_data[19 / sizeof(void *)];
                 } status;
                 struct {
                         struct ieee80211_tx_rate driver_rates[
@@ -879,6 +882,9 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
  *      subframes share the same sequence number. Reported subframes can be
  *      either regular MSDU or singly A-MSDUs. Subframes must not be
  *      interleaved with other frames.
+ * @RX_FLAG_RADIOTAP_VENDOR_DATA: This frame contains vendor-specific
+ *      radiotap data in the skb->data (before the frame) as described by
+ *      the &struct ieee80211_vendor_radiotap.
  */
 enum mac80211_rx_flags {
         RX_FLAG_MMIC_ERROR              = BIT(0),
@@ -908,6 +914,7 @@ enum mac80211_rx_flags {
         RX_FLAG_10MHZ                   = BIT(28),
         RX_FLAG_5MHZ                    = BIT(29),
         RX_FLAG_AMSDU_MORE              = BIT(30),
+        RX_FLAG_RADIOTAP_VENDOR_DATA    = BIT(31),
 };
 
 #define RX_FLAG_STBC_SHIFT              26
@@ -979,6 +986,39 @@ struct ieee80211_rx_status {
 };
 
 /**
+ * struct ieee80211_vendor_radiotap - vendor radiotap data information
+ * @present: presence bitmap for this vendor namespace
+ *      (this could be extended in the future if any vendor needs more
+ *       bits, the radiotap spec does allow for that)
+ * @align: radiotap vendor namespace alignment. This defines the needed
+ *      alignment for the @data field below, not for the vendor namespace
+ *      description itself (which has a fixed 2-byte alignment)
+ *      Must be a power of two, and be set to at least 1!
+ * @oui: radiotap vendor namespace OUI
+ * @subns: radiotap vendor sub namespace
+ * @len: radiotap vendor sub namespace skip length, if alignment is done
+ *      then that's added to this, i.e. this is only the length of the
+ *      @data field.
+ * @pad: number of bytes of padding after the @data, this exists so that
+ *      the skb data alignment can be preserved even if the data has odd
+ *      length
+ * @data: the actual vendor namespace data
+ *
+ * This struct, including the vendor data, goes into the skb->data before
+ * the 802.11 header. It's split up in mac80211 using the align/oui/subns
+ * data.
+ */
+struct ieee80211_vendor_radiotap {
+        u32 present;
+        u8 align;
+        u8 oui[3];
+        u8 subns;
+        u8 pad;
+        u16 len;
+        u8 data[];
+} __packed;
+
+/**
  * enum ieee80211_conf_flags - configuration flags
  *
  * Flags to define PHY configuration options
@@ -1117,6 +1157,8 @@ struct ieee80211_conf {
  *      Function (TSF) timer when the frame containing the channel switch
  *      announcement was received. This is simply the rx.mactime parameter
  *      the driver passed into mac80211.
+ * @device_timestamp: arbitrary timestamp for the device, this is the
+ *      rx.device_timestamp parameter the driver passed to mac80211.
  * @block_tx: Indicates whether transmission must be blocked before the
  *      scheduled channel switch, as indicated by the AP.
  * @chandef: the new channel to switch to
@@ -1124,6 +1166,7 @@ struct ieee80211_conf {
  */
 struct ieee80211_channel_switch {
         u64 timestamp;
+        u32 device_timestamp;
         bool block_tx;
         struct cfg80211_chan_def chandef;
         u8 count;
@@ -1423,6 +1466,8 @@ struct ieee80211_sta_rates {
  * @smps_mode: current SMPS mode (off, static or dynamic)
  * @rates: rate control selection table
  * @tdls: indicates whether the STA is a TDLS peer
+ * @tdls_initiator: indicates the STA is an initiator of the TDLS link. Only
+ *      valid if the STA is a TDLS peer in the first place.
  */
 struct ieee80211_sta {
         u32 supp_rates[IEEE80211_NUM_BANDS];
@@ -1438,6 +1483,7 @@ struct ieee80211_sta {
         enum ieee80211_smps_mode smps_mode;
         struct ieee80211_sta_rates __rcu *rates;
         bool tdls;
+        bool tdls_initiator;
 
         /* must be last */
         u8 drv_priv[0] __aligned(sizeof(void *));
@@ -1576,6 +1622,10 @@ struct ieee80211_tx_control {
  *      a virtual monitor interface when monitor interfaces are the only
  *      active interfaces.
  *
+ * @IEEE80211_HW_NO_AUTO_VIF: The driver would like for no wlanX to
+ *      be created.  It is expected user-space will create vifs as
+ *      desired (and thus have them named as desired).
+ *
  * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface
  *      queue mapping in order to use different queues (not just one per AC)
  *      for different virtual interfaces. See the doc section on HW queue
@@ -1622,7 +1672,8 @@ enum ieee80211_hw_flags {
         IEEE80211_HW_SUPPORTS_DYNAMIC_PS                = 1<<12,
         IEEE80211_HW_MFP_CAPABLE                        = 1<<13,
         IEEE80211_HW_WANT_MONITOR_VIF                   = 1<<14,
-        /* free slots */
+        IEEE80211_HW_NO_AUTO_VIF                        = 1<<15,
+        /* free slot */
         IEEE80211_HW_SUPPORTS_UAPSD                     = 1<<17,
         IEEE80211_HW_REPORTS_TX_ACK_STATUS              = 1<<18,
         IEEE80211_HW_CONNECTION_MONITOR                 = 1<<19,
@@ -1776,6 +1827,31 @@ struct ieee80211_scan_request {
 };
 
 /**
+ * struct ieee80211_tdls_ch_sw_params - TDLS channel switch parameters
+ *
+ * @sta: peer this TDLS channel-switch request/response came from
+ * @chandef: channel referenced in a TDLS channel-switch request
+ * @action_code: see &enum ieee80211_tdls_actioncode
+ * @status: channel-switch response status
+ * @timestamp: time at which the frame was received
+ * @switch_time: switch-timing parameter received in the frame
+ * @switch_timeout: switch-timing parameter received in the frame
+ * @tmpl_skb: TDLS switch-channel response template
+ * @ch_sw_tm_ie: offset of the channel-switch timing IE inside @tmpl_skb
+ */
+struct ieee80211_tdls_ch_sw_params {
+        struct ieee80211_sta *sta;
+        struct cfg80211_chan_def *chandef;
+        u8 action_code;
+        u32 status;
+        u32 timestamp;
+        u16 switch_time;
+        u16 switch_timeout;
+        struct sk_buff *tmpl_skb;
+        u32 ch_sw_tm_ie;
+};
+
+/**
  * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy
  *
  * @wiphy: the &struct wiphy which we want to query
@@ -2375,6 +2451,22 @@ enum ieee80211_roc_type {
 };
 
 /**
+ * enum ieee80211_reconfig_complete_type - reconfig type
+ *
+ * This enum is used by the reconfig_complete() callback to indicate what
+ * reconfiguration type was completed.
+ *
+ * @IEEE80211_RECONFIG_TYPE_RESTART: hw restart type
+ *      (also due to resume() callback returning 1)
+ * @IEEE80211_RECONFIG_TYPE_SUSPEND: suspend type (regardless
+ *      of wowlan configuration)
+ */
+enum ieee80211_reconfig_type {
+        IEEE80211_RECONFIG_TYPE_RESTART,
+        IEEE80211_RECONFIG_TYPE_SUSPEND,
+};
+
+/**
  * struct ieee80211_ops - callbacks from mac80211 to the driver
  *
  * This structure contains various callbacks that the driver may
@@ -2530,7 +2622,9 @@ enum ieee80211_roc_type {
  *
  * @sw_scan_start: Notifier function that is called just before a software scan
  *      is started. Can be NULL, if the driver doesn't need this notification.
- *      The callback can sleep.
+ *      The mac_addr parameter allows supporting NL80211_SCAN_FLAG_RANDOM_ADDR,
+ *      the driver may set the NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR flag if it
+ *      can use this parameter. The callback can sleep.
  *
  * @sw_scan_complete: Notifier function that is called just after a
  *      software scan finished. Can be NULL, if the driver doesn't need
@@ -2601,6 +2695,9 @@ enum ieee80211_roc_type {
  *      uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since
  *      otherwise the rate control algorithm is notified directly.
  *      Must be atomic.
+ * @sta_rate_tbl_update: Notifies the driver that the rate table changed. This
+ *      is only used if the configured rate control algorithm actually uses
+ *      the new rate table API, and is therefore optional. Must be atomic.
  *
  * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
  *      bursting) for a hardware TX queue.
@@ -2809,11 +2906,11 @@ enum ieee80211_roc_type {
  *      disabled/enabled via @bss_info_changed.
  * @stop_ap: Stop operation on the AP interface.
  *
- * @restart_complete: Called after a call to ieee80211_restart_hw(), when the
- *      reconfiguration has completed. This can help the driver implement the
- *      reconfiguration step. Also called when reconfiguring because the
- *      driver's resume function returned 1, as this is just like an "inline"
- *      hardware restart. This callback may sleep.
+ * @reconfig_complete: Called after a call to ieee80211_restart_hw() and
+ *      during resume, when the reconfiguration has completed.
+ *      This can help the driver implement the reconfiguration step (and
+ *      indicate mac80211 is ready to receive frames).
+ *      This callback may sleep.
  *
  * @ipv6_addr_change: IPv6 address assignment on the given interface changed.
  *      Currently, this is only called for managed or P2P client interfaces.
@@ -2829,6 +2926,13 @@ enum ieee80211_roc_type {
  *      transmitted and then call ieee80211_csa_finish().
  *      If the CSA count starts as zero or 1, this function will not be called,
  *      since there won't be any time to beacon before the switch anyway.
+ * @pre_channel_switch: This is an optional callback that is called
+ *      before a channel switch procedure is started (ie. when a STA
+ *      gets a CSA or an userspace initiated channel-switch), allowing
+ *      the driver to prepare for the channel switch.
+ * @post_channel_switch: This is an optional callback that is called
+ *      after a channel switch procedure is completed, allowing the
+ *      driver to go back to a normal configuration.
  *
  * @join_ibss: Join an IBSS (on an IBSS interface); this is called after all
  *      information in bss_conf is set up and the beacon can be retrieved. A
@@ -2838,6 +2942,26 @@ enum ieee80211_roc_type {
  * @get_expected_throughput: extract the expected throughput towards the
  *      specified station. The returned value is expressed in Kbps. It returns 0
  *      if the RC algorithm does not have proper data to provide.
+ *
+ * @get_txpower: get current maximum tx power (in dBm) based on configuration
+ *      and hardware limits.
+ *
+ * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver
+ *      is responsible for continually initiating channel-switching operations
+ *      and returning to the base channel for communication with the AP. The
+ *      driver receives a channel-switch request template and the location of
+ *      the switch-timing IE within the template as part of the invocation.
+ *      The template is valid only within the call, and the driver can
+ *      optionally copy the skb for further re-use.
+ * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both
+ *      peers must be on the base channel when the call completes.
+ * @tdls_recv_channel_switch: a TDLS channel-switch related frame (request or
+ *      response) has been received from a remote peer. The driver gets
+ *      parameters parsed from the incoming frame and may use them to continue
+ *      an ongoing channel-switch operation. In addition, a channel-switch
+ *      response template is provided, together with the location of the
+ *      switch-timing IE within the template. The skb can only be used within
+ *      the function call.
  */
 struct ieee80211_ops {
         void (*tx)(struct ieee80211_hw *hw,
@@ -2897,8 +3021,11 @@ struct ieee80211_ops {
                                 struct ieee80211_scan_ies *ies);
         int (*sched_scan_stop)(struct ieee80211_hw *hw,
                                struct ieee80211_vif *vif);
-        void (*sw_scan_start)(struct ieee80211_hw *hw);
-        void (*sw_scan_complete)(struct ieee80211_hw *hw);
+        void (*sw_scan_start)(struct ieee80211_hw *hw,
+                              struct ieee80211_vif *vif,
+                              const u8 *mac_addr);
+        void (*sw_scan_complete)(struct ieee80211_hw *hw,
+                                 struct ieee80211_vif *vif);
         int (*get_stats)(struct ieee80211_hw *hw,
                          struct ieee80211_low_level_stats *stats);
         void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx,
@@ -2932,6 +3059,9 @@ struct ieee80211_ops {
                               struct ieee80211_vif *vif,
                               struct ieee80211_sta *sta,
                               u32 changed);
+        void (*sta_rate_tbl_update)(struct ieee80211_hw *hw,
+                                    struct ieee80211_vif *vif,
+                                    struct ieee80211_sta *sta);
         int (*conf_tx)(struct ieee80211_hw *hw,
                        struct ieee80211_vif *vif, u16 ac,
                        const struct ieee80211_tx_queue_params *params);
@@ -2959,6 +3089,7 @@ struct ieee80211_ops {
         void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                       u32 queues, bool drop);
         void (*channel_switch)(struct ieee80211_hw *hw,
+                               struct ieee80211_vif *vif,
                                struct ieee80211_channel_switch *ch_switch);
         int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
         int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
@@ -3025,7 +3156,8 @@ struct ieee80211_ops {
                                   int n_vifs,
                                   enum ieee80211_chanctx_switch_mode mode);
 
-        void (*restart_complete)(struct ieee80211_hw *hw);
+        void (*reconfig_complete)(struct ieee80211_hw *hw,
+                                  enum ieee80211_reconfig_type reconfig_type);
 
 #if IS_ENABLED(CONFIG_IPV6)
         void (*ipv6_addr_change)(struct ieee80211_hw *hw,
@@ -3035,14 +3167,54 @@ struct ieee80211_ops {
         void (*channel_switch_beacon)(struct ieee80211_hw *hw,
                                       struct ieee80211_vif *vif,
                                       struct cfg80211_chan_def *chandef);
+        int (*pre_channel_switch)(struct ieee80211_hw *hw,
+                                  struct ieee80211_vif *vif,
+                                  struct ieee80211_channel_switch *ch_switch);
+
+        int (*post_channel_switch)(struct ieee80211_hw *hw,
+                                   struct ieee80211_vif *vif);
 
         int (*join_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
         void (*leave_ibss)(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
         u32 (*get_expected_throughput)(struct ieee80211_sta *sta);
+        int (*get_txpower)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+                           int *dbm);
+
+        int (*tdls_channel_switch)(struct ieee80211_hw *hw,
+                                   struct ieee80211_vif *vif,
+                                   struct ieee80211_sta *sta, u8 oper_class,
+                                   struct cfg80211_chan_def *chandef,
+                                   struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie);
+        void (*tdls_cancel_channel_switch)(struct ieee80211_hw *hw,
+                                           struct ieee80211_vif *vif,
+                                           struct ieee80211_sta *sta);
+        void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw,
+                                         struct ieee80211_vif *vif,
+                                         struct ieee80211_tdls_ch_sw_params *params);
 };
 
 /**
- * ieee80211_alloc_hw -  Allocate a new hardware device
+ * ieee80211_alloc_hw_nm - Allocate a new hardware device
+ *
+ * This must be called once for each hardware device. The returned pointer
+ * must be used to refer to this device when calling other functions.
+ * mac80211 allocates a private data area for the driver pointed to by
+ * @priv in &struct ieee80211_hw, the size of this area is given as
+ * @priv_data_len.
+ *
+ * @priv_data_len: length of private data
+ * @ops: callbacks for this device
+ * @requested_name: Requested name for this device.
+ *      NULL is valid value, and means use the default naming (phy%d)
+ *
+ * Return: A pointer to the new hardware device, or %NULL on error.
+ */
+struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
+                                           const struct ieee80211_ops *ops,
+                                           const char *requested_name);
+
+/**
+ * ieee80211_alloc_hw - Allocate a new hardware device
  *
  * This must be called once for each hardware device. The returned pointer
  * must be used to refer to this device when calling other functions.
@@ -3055,8 +3227,12 @@ struct ieee80211_ops {
  *
  * Return: A pointer to the new hardware device, or %NULL on error.
  */
+static inline
 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
-                                        const struct ieee80211_ops *ops);
+                                        const struct ieee80211_ops *ops)
+{
+        return ieee80211_alloc_hw_nm(priv_data_len, ops, NULL);
+}
 
 /**
  * ieee80211_register_hw - Register hardware device
@@ -3443,6 +3619,26 @@ void ieee80211_tx_status(struct ieee80211_hw *hw,
                          struct sk_buff *skb);
 
 /**
+ * ieee80211_tx_status_noskb - transmit status callback without skb
+ *
+ * This function can be used as a replacement for ieee80211_tx_status
+ * in drivers that cannot reliably map tx status information back to
+ * specific skbs.
+ *
+ * Calls to this function for a single hardware must be synchronized
+ * against each other. Calls to this function, ieee80211_tx_status_ni()
+ * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware.
+ *
+ * @hw: the hardware the frame was transmitted by
+ * @sta: the receiver station to which this packet is sent
+ *      (NULL for multicast packets)
+ * @info: tx status information
+ */
+void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
+                               struct ieee80211_sta *sta,
+                               struct ieee80211_tx_info *info);
+
+/**
  * ieee80211_tx_status_ni - transmit status callback (in process context)
  *
  * Like ieee80211_tx_status() but can be called in process context.
@@ -3655,7 +3851,7 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
 /**
  * ieee80211_probereq_get - retrieve a Probe Request template
  * @hw: pointer obtained from ieee80211_alloc_hw().
- * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ * @src_addr: source MAC address
  * @ssid: SSID buffer
  * @ssid_len: length of SSID
  * @tailroom: tailroom to reserve at end of SKB for IEs
@@ -3666,7 +3862,7 @@ struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
  * Return: The Probe Request template. %NULL on error.
  */
 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
-                                       struct ieee80211_vif *vif,
+                                       const u8 *src_addr,
                                        const u8 *ssid, size_t ssid_len,
                                        size_t tailroom);
 
@@ -4172,6 +4368,22 @@ void ieee80211_iterate_active_interfaces_rtnl(struct ieee80211_hw *hw,
                                               void *data);
 
 /**
+ * ieee80211_iterate_stations_atomic - iterate stations
+ *
+ * This function iterates over all stations associated with a given
+ * hardware that are currently uploaded to the driver and calls the callback
+ * function for them.
+ * This function requires the iterator callback function to be atomic,
+ *
+ * @hw: the hardware struct of which the interfaces should be iterated over
+ * @iterator: the iterator function to call, cannot sleep
+ * @data: first argument of the iterator function
+ */
+void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
+                                       void (*iterator)(void *data,
+                                                struct ieee80211_sta *sta),
+                                       void *data);
+/**
  * ieee80211_queue_work - add work onto the mac80211 workqueue
  *
  * Drivers and mac80211 use this to add work onto the mac80211 workqueue.
@@ -4480,6 +4692,14 @@ void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
                                gfp_t gfp);
 
 /**
+ * ieee80211_cqm_beacon_loss_notify - inform CQM of beacon loss
+ *
+ * @vif: &struct ieee80211_vif pointer from the add_interface callback.
+ * @gfp: context flags
+ */
+void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp);
+
+/**
  * ieee80211_radar_detected - inform that a radar was detected
  *
  * @hw: pointer as obtained from ieee80211_alloc_hw()
@@ -4637,6 +4857,10 @@ struct rate_control_ops {
         void (*free_sta)(void *priv, struct ieee80211_sta *sta,
                          void *priv_sta);
 
+        void (*tx_status_noskb)(void *priv,
+                                struct ieee80211_supported_band *sband,
+                                struct ieee80211_sta *sta, void *priv_sta,
+                                struct ieee80211_tx_info *info);
         void (*tx_status)(void *priv, struct ieee80211_supported_band *sband,
                           struct ieee80211_sta *sta, void *priv_sta,
                           struct sk_buff *skb);
@@ -4888,4 +5112,69 @@ void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf);
 void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer,
                                  enum nl80211_tdls_operation oper,
                                  u16 reason_code, gfp_t gfp);
+
+/**
+ * ieee80211_reserve_tid - request to reserve a specific TID
+ *
+ * There is sometimes a need (such as in TDLS) for blocking the driver from
+ * using a specific TID so that the FW can use it for certain operations such
+ * as sending PTI requests. To make sure that the driver doesn't use that TID,
+ * this function must be called as it flushes out packets on this TID and marks
+ * it as blocked, so that any transmit for the station on this TID will be
+ * redirected to the alternative TID in the same AC.
+ *
+ * Note that this function blocks and may call back into the driver, so it
+ * should be called without driver locks held. Also note this function should
+ * only be called from the driver's @sta_state callback.
+ *
+ * @sta: the station to reserve the TID for
+ * @tid: the TID to reserve
+ *
+ * Returns: 0 on success, else on failure
+ */
+int ieee80211_reserve_tid(struct ieee80211_sta *sta, u8 tid);
+
+/**
+ * ieee80211_unreserve_tid - request to unreserve a specific TID
+ *
+ * Once there is no longer any need for reserving a certain TID, this function
+ * should be called, and no longer will packets have their TID modified for
+ * preventing use of this TID in the driver.
+ *
+ * Note that this function blocks and acquires a lock, so it should be called
+ * without driver locks held. Also note this function should only be called
+ * from the driver's @sta_state callback.
+ *
+ * @sta: the station
+ * @tid: the TID to unreserve
+ */
+void ieee80211_unreserve_tid(struct ieee80211_sta *sta, u8 tid);
+
+/**
+ * ieee80211_ie_split - split an IE buffer according to ordering
+ *
+ * @ies: the IE buffer
+ * @ielen: the length of the IE buffer
+ * @ids: an array with element IDs that are allowed before
+ *      the split
+ * @n_ids: the size of the element ID array
+ * @offset: offset where to start splitting in the buffer
+ *
+ * This function splits an IE buffer by updating the @offset
+ * variable to point to the location where the buffer should be
+ * split.
+ *
+ * It assumes that the given IE buffer is well-formed, this
+ * has to be guaranteed by the caller!
+ *
+ * It also assumes that the IEs in the buffer are ordered
+ * correctly, if not the result of using this function will not
+ * be ordered correctly either, i.e. it does no reordering.
+ *
+ * The function returns the offset where the next part of the
+ * buffer starts, which may be @ielen if the entire (remainder)
+ * of the buffer should be used.
+ */
+size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
+                          const u8 *ids, int n_ids, size_t offset);
 #endif /* MAC80211_H */