From 36323f817af0376c78612cfdab714b0feb05fea5 Mon Sep 17 00:00:00 2001 From: Thomas Huehn Date: Mon, 23 Jul 2012 21:33:42 +0200 Subject: mac80211: move TX station pointer and restructure TX Remove the control.sta pointer from ieee80211_tx_info to free up sufficient space in the TX skb control buffer for the upcoming Transmit Power Control (TPC). Instead, the pointer is now on the stack in a new control struct that is passed as a function parameter to the drivers' tx method. Signed-off-by: Thomas Huehn Signed-off-by: Alina Friedrichsen Signed-off-by: Felix Fietkau [reworded commit message] Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index acf712ffb5e6..7558ba58ea23 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1204,6 +1204,7 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local, struct sk_buff_head *skbs, bool txpending) { + struct ieee80211_tx_control control; struct sk_buff *skb, *tmp; unsigned long flags; @@ -1240,10 +1241,10 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local, spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); info->control.vif = vif; - info->control.sta = sta; + control.sta = sta; __skb_unlink(skb, skbs); - drv_tx(local, skb); + drv_tx(local, &control, skb); } return true; -- cgit v1.2.1 From 6b77863b719a4e32909c218c0d5a83a14f4d98c5 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 23 Jul 2012 14:53:27 +0200 Subject: mac80211: fix current vs. operating channel in preq/beacon When sending probe requests, e.g. during software scanning, these will go out on the *current* channel, so their IEs need to be built from the current channel. At other times, e.g. for beacons or probe request templates, the IEs will be used on the *operating* channel and using the current channel instead might result in errors. Add the appropriate parameters to respect the difference. Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 7558ba58ea23..b559c6bd8681 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2303,7 +2303,7 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, struct ieee80211_if_ap *ap = NULL; struct beacon_data *beacon; struct ieee80211_supported_band *sband; - enum ieee80211_band band = local->hw.conf.channel->band; + enum ieee80211_band band = local->oper_channel->band; struct ieee80211_tx_rate_control txrc; sband = local->hw.wiphy->bands[band]; @@ -2429,9 +2429,9 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, *pos++ = WLAN_EID_SSID; *pos++ = 0x0; - if (ieee80211_add_srates_ie(sdata, skb, true) || + if (ieee80211_add_srates_ie(sdata, skb, true, band) || mesh_add_ds_params_ie(skb, sdata) || - ieee80211_add_ext_srates_ie(sdata, skb, true) || + ieee80211_add_ext_srates_ie(sdata, skb, true, band) || mesh_add_rsn_ie(skb, sdata) || mesh_add_ht_cap_ie(skb, sdata) || mesh_add_ht_oper_ie(skb, sdata) || -- cgit v1.2.1 From 2d56577bc68e56097a1cd6599b678e8cab758e64 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 23 Jul 2012 15:12:51 +0200 Subject: mac80211: use correct channel in TX Since we only need the band, remove the channel pointer from struct ieee80211_tx_data and also assign it properly, depending on context, to the correct operating or current channel. Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index b559c6bd8681..5b81660a35b3 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -55,7 +55,7 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx, if (WARN_ON_ONCE(info->control.rates[0].idx < 0)) return 0; - sband = local->hw.wiphy->bands[tx->channel->band]; + sband = local->hw.wiphy->bands[info->band]; txrate = &sband->bitrates[info->control.rates[0].idx]; erp = txrate->flags & IEEE80211_RATE_ERP_G; @@ -615,7 +615,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) memset(&txrc, 0, sizeof(txrc)); - sband = tx->local->hw.wiphy->bands[tx->channel->band]; + sband = tx->local->hw.wiphy->bands[info->band]; len = min_t(u32, tx->skb->len + FCS_LEN, tx->local->hw.wiphy->frag_threshold); @@ -626,13 +626,13 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) txrc.bss_conf = &tx->sdata->vif.bss_conf; txrc.skb = tx->skb; txrc.reported_rate.idx = -1; - txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[tx->channel->band]; + txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band]; if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) txrc.max_rate_idx = -1; else txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; memcpy(txrc.rate_idx_mcs_mask, - tx->sdata->rc_rateidx_mcs_mask[tx->channel->band], + tx->sdata->rc_rateidx_mcs_mask[info->band], sizeof(txrc.rate_idx_mcs_mask)); txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP || tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT || @@ -667,7 +667,7 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx) "scanning and associated. Target station: " "%pM on %d GHz band\n", tx->sdata->name, hdr->addr1, - tx->channel->band ? 5 : 2)) + info->band ? 5 : 2)) return TX_DROP; /* @@ -1131,7 +1131,6 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata, tx->skb = skb; tx->local = local; tx->sdata = sdata; - tx->channel = local->hw.conf.channel; __skb_queue_head_init(&tx->skbs); /* @@ -1400,8 +1399,7 @@ static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata, goto out; } - tx.channel = local->hw.conf.channel; - info->band = tx.channel->band; + info->band = local->hw.conf.channel->band; /* set up hw_queue value early */ if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) || @@ -2710,8 +2708,7 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw, info = IEEE80211_SKB_CB(skb); tx.flags |= IEEE80211_TX_PS_BUFFERED; - tx.channel = local->hw.conf.channel; - info->band = tx.channel->band; + info->band = local->oper_channel->band; if (invoke_tx_handlers(&tx)) skb = NULL; -- cgit v1.2.1 From e83e6541cee0a12bc445b0f4fad5214df5803087 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 13 Jul 2012 16:23:07 +0200 Subject: mac80211: use eth_broadcast_addr Instead of memset(). Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 5b81660a35b3..7dbcf293708b 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2415,7 +2415,7 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, memset(mgmt, 0, hdr_len); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON); - memset(mgmt->da, 0xff, ETH_ALEN); + eth_broadcast_addr(mgmt->da); memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); mgmt->u.beacon.beacon_int = @@ -2609,9 +2609,9 @@ struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, memset(hdr, 0, sizeof(*hdr)); hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ); - memset(hdr->addr1, 0xff, ETH_ALEN); + eth_broadcast_addr(hdr->addr1); memcpy(hdr->addr2, vif->addr, ETH_ALEN); - memset(hdr->addr3, 0xff, ETH_ALEN); + eth_broadcast_addr(hdr->addr3); pos = skb_put(skb, ie_ssid_len); *pos++ = WLAN_EID_SSID; -- cgit v1.2.1 From aa7a00809cf6afe3cd6f5af2889110b47b798667 Mon Sep 17 00:00:00 2001 From: Eyal Shapira Date: Mon, 6 Aug 2012 14:26:16 +0300 Subject: mac80211: avoid using synchronize_rcu in ieee80211_set_probe_resp This could take a while (100ms+) and may delay sending assoc resp in AP mode with WPS or P2P GO (as setting the probe resp takes place there). We've encountered situations where the delay was big enough to cause connection problems with devices like Galaxy Nexus. Switch to using call_rcu with a free handler. [Arik - rework to use plain buffer and instead of skb] Signed-off-by: Eyal Shapira Signed-off-by: Arik Nemtsov Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 7dbcf293708b..2d004ba0615e 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2481,7 +2481,8 @@ struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ieee80211_if_ap *ap = NULL; - struct sk_buff *presp = NULL, *skb = NULL; + struct sk_buff *skb = NULL; + struct probe_resp *presp = NULL; struct ieee80211_hdr *hdr; struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); @@ -2495,10 +2496,12 @@ struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, if (!presp) goto out; - skb = skb_copy(presp, GFP_ATOMIC); + skb = dev_alloc_skb(presp->len); if (!skb) goto out; + memcpy(skb_put(skb, presp->len), presp->data, presp->len); + hdr = (struct ieee80211_hdr *) skb->data; memset(hdr->addr1, 0, sizeof(hdr->addr1)); -- cgit v1.2.1 From e31583cdf0e2eb71c44b1288a2d93405f972da68 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 26 Jul 2012 14:07:46 +0200 Subject: mac80211: remove almost unused local variable In ieee80211_beacon_get_tim() we can use the txrc.sband instead of a separate local variable. Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 2d004ba0615e..2d2f45ecca4d 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -2300,12 +2300,9 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, struct ieee80211_sub_if_data *sdata = NULL; struct ieee80211_if_ap *ap = NULL; struct beacon_data *beacon; - struct ieee80211_supported_band *sband; enum ieee80211_band band = local->oper_channel->band; struct ieee80211_tx_rate_control txrc; - sband = local->hw.wiphy->bands[band]; - rcu_read_lock(); sdata = vif_to_sdata(vif); @@ -2452,12 +2449,12 @@ struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, memset(&txrc, 0, sizeof(txrc)); txrc.hw = hw; - txrc.sband = sband; + txrc.sband = local->hw.wiphy->bands[band]; txrc.bss_conf = &sdata->vif.bss_conf; txrc.skb = skb; txrc.reported_rate.idx = -1; txrc.rate_idx_mask = sdata->rc_rateidx_mask[band]; - if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1) + if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1) txrc.max_rate_idx = -1; else txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1; -- cgit v1.2.1 From dcf33963c48e1959c83fda84e336dbb000eefa3f Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 30 Jul 2012 15:11:56 +0200 Subject: mac80211: clean up ieee80211_subif_start_xmit There's no need to carry around a return value that is always NETDEV_TX_OK anyway. Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 23 ++++++----------------- 1 file changed, 6 insertions(+), 17 deletions(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 2d2f45ecca4d..3b807bcb8fc9 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1719,7 +1719,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); struct ieee80211_local *local = sdata->local; struct ieee80211_tx_info *info; - int ret = NETDEV_TX_BUSY, head_need; + int head_need; u16 ethertype, hdrlen, meshhdrlen = 0; __le16 fc; struct ieee80211_hdr hdr; @@ -1735,10 +1735,8 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, u32 info_flags = 0; u16 info_id = 0; - if (unlikely(skb->len < ETH_HLEN)) { - ret = NETDEV_TX_OK; + if (unlikely(skb->len < ETH_HLEN)) goto fail; - } /* convert Ethernet header to proper 802.11 header (based on * operation mode) */ @@ -1786,7 +1784,6 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, if (!sdata->u.mesh.mshcfg.dot11MeshTTL) { /* Do not send frames with mesh_ttl == 0 */ sdata->u.mesh.mshstats.dropped_frames_ttl++; - ret = NETDEV_TX_OK; goto fail; } rcu_read_lock(); @@ -1879,10 +1876,8 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, if (tdls_direct) { /* link during setup - throw out frames to peer */ - if (!tdls_auth) { - ret = NETDEV_TX_OK; + if (!tdls_auth) goto fail; - } /* DA SA BSSID */ memcpy(hdr.addr1, skb->data, ETH_ALEN); @@ -1916,7 +1911,6 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, hdrlen = 24; break; default: - ret = NETDEV_TX_OK; goto fail; } @@ -1961,7 +1955,6 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, I802_DEBUG_INC(local->tx_handlers_drop_unauth_port); - ret = NETDEV_TX_OK; goto fail; } @@ -2016,10 +2009,8 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, skb = skb_clone(skb, GFP_ATOMIC); kfree_skb(tmp_skb); - if (!skb) { - ret = NETDEV_TX_OK; + if (!skb) goto fail; - } } hdr.frame_control = fc; @@ -2122,10 +2113,8 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, return NETDEV_TX_OK; fail: - if (ret == NETDEV_TX_OK) - dev_kfree_skb(skb); - - return ret; + dev_kfree_skb(skb); + return NETDEV_TX_OK; } -- cgit v1.2.1 From 27f011243a6e4e8b81078df1d83608dae31e3d38 Mon Sep 17 00:00:00 2001 From: Thomas Pedersen Date: Mon, 20 Aug 2012 11:28:25 -0700 Subject: mac80211: fix DS to MBSS address translation The destination address of unicast frames forwarded through a mesh gate was being replaced with the broadcast address. Instead leave the original destination address as the mesh DA. If the nexthop address is not in the mpath table it will be resolved. If that fails, the frame will be forwarded to known mesh gates. Reported-by: Cedric Voncken Signed-off-by: Thomas Pedersen Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 38 ++++++++++++++++---------------------- 1 file changed, 16 insertions(+), 22 deletions(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index acf712ffb5e6..c5e8c9c31f76 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -1811,37 +1811,31 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb, meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, sdata, NULL, NULL); } else { - int is_mesh_mcast = 1; - const u8 *mesh_da; + /* DS -> MBSS (802.11-2012 13.11.3.3). + * For unicast with unknown forwarding information, + * destination might be in the MBSS or if that fails + * forwarded to another mesh gate. In either case + * resolution will be handled in ieee80211_xmit(), so + * leave the original DA. This also works for mcast */ + const u8 *mesh_da = skb->data; + + if (mppath) + mesh_da = mppath->mpp; + else if (mpath) + mesh_da = mpath->dst; + rcu_read_unlock(); - if (is_multicast_ether_addr(skb->data)) - /* DA TA mSA AE:SA */ - mesh_da = skb->data; - else { - static const u8 bcast[ETH_ALEN] = - { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; - if (mppath) { - /* RA TA mDA mSA AE:DA SA */ - mesh_da = mppath->mpp; - is_mesh_mcast = 0; - } else if (mpath) { - mesh_da = mpath->dst; - is_mesh_mcast = 0; - } else { - /* DA TA mSA AE:SA */ - mesh_da = bcast; - } - } hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc, mesh_da, sdata->vif.addr); - rcu_read_unlock(); - if (is_mesh_mcast) + if (is_multicast_ether_addr(mesh_da)) + /* DA TA mSA AE:SA */ meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, sdata, skb->data + ETH_ALEN, NULL); else + /* RA TA mDA mSA AE:DA SA */ meshhdrlen = ieee80211_new_mesh_header(&mesh_hdr, sdata, -- cgit v1.2.1 From e548c49e6dc6b08b59042930a2e90c69c13c9293 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 4 Sep 2012 17:08:23 +0200 Subject: mac80211: add key flag for management keys Mark keys that might be used to receive management frames so drivers can fall back on software crypto for them if they don't support hardware offload. As the new flag is only set correctly for RX keys and the existing IEEE80211_KEY_FLAG_SW_MGMT flag can only affect TX, also rename the latter to IEEE80211_KEY_FLAG_SW_MGMT_TX. Signed-off-by: Johannes Berg --- net/mac80211/tx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/mac80211/tx.c') diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 29eb4e678235..e0e0d1d0e830 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -580,7 +580,7 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) tx->key = NULL; else skip_hw = (tx->key->conf.flags & - IEEE80211_KEY_FLAG_SW_MGMT) && + IEEE80211_KEY_FLAG_SW_MGMT_TX) && ieee80211_is_mgmt(hdr->frame_control); break; case WLAN_CIPHER_SUITE_AES_CMAC: -- cgit v1.2.1