Move the beacon handler into mesh_neighbour_update where the STA pointer is already available. This avoids additional overhead and simplifies the handler. The repositioning will also benefit mesh PS which uses T_r and the updated T_offset value. Allow calculating T_offset from probe response frames as mandated in IEEE 802.11-2012.
Signed-off-by: Marco Porsch <[email protected]> --- v4: calculate T_offset from probe response frames (Thomas) net/mac80211/ieee80211_i.h | 5 ++--- net/mac80211/mesh.c | 7 +------ net/mac80211/mesh.h | 4 +++- net/mac80211/mesh_plink.c | 30 +++++++++++++++++++++++------ net/mac80211/mesh_sync.c | 45 ++++++++------------------------------------ 5 files changed, 38 insertions(+), 53 deletions(-) diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 54d09ec..5284ffa 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -529,11 +529,10 @@ struct ieee80211_if_ibss { */ struct ieee802_11_elems; struct ieee80211_mesh_sync_ops { - void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata, - u16 stype, + void (*rx_bcn_presp)(struct sta_info *sta, struct ieee80211_mgmt *mgmt, struct ieee802_11_elems *elems, - struct ieee80211_rx_status *rx_status); + u64 t_r); void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata); /* add other framework functions here */ }; diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c index f5d1afa..bfc5ee6 100644 --- a/net/mac80211/mesh.c +++ b/net/mac80211/mesh.c @@ -885,7 +885,6 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, struct ieee80211_rx_status *rx_status) { struct ieee80211_local *local = sdata->local; - struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; struct ieee802_11_elems elems; struct ieee80211_channel *channel; size_t baselen; @@ -921,11 +920,7 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, return; if (mesh_matches_local(sdata, &elems)) - mesh_neighbour_update(sdata, mgmt->sa, &elems); - - if (ifmsh->sync_ops) - ifmsh->sync_ops->rx_bcn_presp(sdata, - stype, mgmt, &elems, rx_status); + mesh_neighbour_update(sdata, mgmt, &elems, rx_status); } static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h index 6ffabbe..594c43a 100644 --- a/net/mac80211/mesh.h +++ b/net/mac80211/mesh.h @@ -283,7 +283,9 @@ int mesh_gate_num(struct ieee80211_sub_if_data *sdata); /* Mesh plinks */ void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata, - u8 *hw_addr, struct ieee802_11_elems *ie); + struct ieee80211_mgmt *mgmt, + struct ieee802_11_elems *ie, + struct ieee80211_rx_status *rx_status); bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie); u32 mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata); void mesh_plink_broken(struct sta_info *sta); diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c index 08df966..91dea29 100644 --- a/net/mac80211/mesh_plink.c +++ b/net/mac80211/mesh_plink.c @@ -12,6 +12,7 @@ #include "ieee80211_i.h" #include "rate.h" #include "mesh.h" +#include "driver-ops.h" #define PLINK_GET_LLID(p) (p + 2) #define PLINK_GET_PLID(p) (p + 4) @@ -492,28 +493,45 @@ mesh_sta_info_get(struct ieee80211_sub_if_data *sdata, * * @sdata: local meshif * @addr: peer's address - * @elems: IEs from beacon or mesh peering frame + * @elems: IEs from beacon or mesh probe response * * Initiates peering if appropriate. */ void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata, - u8 *hw_addr, - struct ieee802_11_elems *elems) + struct ieee80211_mgmt *mgmt, + struct ieee802_11_elems *elems, + struct ieee80211_rx_status *rx_status) { + struct ieee80211_local *local = sdata->local; + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; struct sta_info *sta; u32 changed = 0; + u64 t_r; + + /* + * If available, calculate the time the beacon timestamp field was + * received from the rx_status->mactime field. Otherwise get the + * current TSF as approximation before entering rcu-read section. + */ + if (ieee80211_have_rx_timestamp(rx_status)) + t_r = ieee80211_calculate_rx_timestamp(local, rx_status, + 24 + 12 + elems->total_len + FCS_LEN, 24); + else + t_r = drv_get_tsf(local, sdata); - sta = mesh_sta_info_get(sdata, hw_addr, elems); + sta = mesh_sta_info_get(sdata, mgmt->sa, elems); if (!sta) goto out; if (mesh_peer_accepts_plinks(elems) && sta->plink_state == NL80211_PLINK_LISTEN && - sdata->u.mesh.accepting_plinks && - sdata->u.mesh.mshcfg.auto_open_plinks && + ifmsh->accepting_plinks && ifmsh->mshcfg.auto_open_plinks && rssi_threshold_check(sta, sdata)) changed = mesh_plink_open(sta); + if (ifmsh->sync_ops) + ifmsh->sync_ops->rx_bcn_presp(sta, mgmt, elems, t_r); + ieee80211_mps_frame_release(sta, elems); out: rcu_read_unlock(); diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c index 05a256b..07bc63c 100644 --- a/net/mac80211/mesh_sync.c +++ b/net/mac80211/mesh_sync.c @@ -75,35 +75,17 @@ void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata) drv_set_tsf(local, sdata, tsf + tsfdelta); } -static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, - u16 stype, - struct ieee80211_mgmt *mgmt, - struct ieee802_11_elems *elems, - struct ieee80211_rx_status *rx_status) +static void mesh_sync_offset_rx_bcn_presp(struct sta_info *sta, + struct ieee80211_mgmt *mgmt, + struct ieee802_11_elems *elems, + u64 t_r) { + struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; - struct ieee80211_local *local = sdata->local; - struct sta_info *sta; - u64 t_t, t_r; + u64 t_t; WARN_ON(ifmsh->mesh_sp_id != IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET); - /* standard mentions only beacons */ - if (stype != IEEE80211_STYPE_BEACON) - return; - - /* The current tsf is a first approximation for the timestamp - * for the received beacon. Further down we try to get a - * better value from the rx_status->mactime field if - * available. Also we have to call drv_get_tsf() before - * entering the rcu-read section.*/ - t_r = drv_get_tsf(local, sdata); - - rcu_read_lock(); - sta = sta_info_get(sdata, mgmt->sa); - if (!sta) - goto no_sync; - /* check offset sync conditions (13.13.2.2.1) * * TODO also sync to @@ -114,17 +96,9 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, clear_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN); msync_dbg(sdata, "STA %pM : is adjusting TBTT\n", sta->sta.addr); - goto no_sync; + return; } - if (ieee80211_have_rx_timestamp(rx_status)) - /* time when timestamp field was received */ - t_r = ieee80211_calculate_rx_timestamp(local, rx_status, - 24 + 12 + - elems->total_len + - FCS_LEN, - 24); - /* Timing offset calculation (see 13.13.2.2.2) */ t_t = le64_to_cpu(mgmt->u.beacon.timestamp); sta->t_offset = t_t - t_r; @@ -144,7 +118,7 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, sta->sta.addr, (long long) t_clockdrift); clear_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN); - goto no_sync; + return; } spin_lock_bh(&ifmsh->sync_offset_lock); @@ -159,9 +133,6 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, sta->sta.addr, (long long) sta->t_offset); } - -no_sync: - rcu_read_unlock(); } static void mesh_sync_offset_adjust_tbtt(struct ieee80211_sub_if_data *sdata) -- 1.7.9.5 _______________________________________________ Devel mailing list [email protected] http://lists.open80211s.org/cgi-bin/mailman/listinfo/devel
