[2/3,v2] cfg80211: introduce capability for 4addr mode

Message ID	1258628119.7094.1.camel@johannes.local (mailing list archive)
State	Not Applicable, archived
Headers	show Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nAJAtrNt000826 for <patchwork-linux-wireless@patchwork.kernel.org>; Thu, 19 Nov 2009 10:55:53 GMT Subject: [PATCH 2/3 v2] cfg80211: introduce capability for 4addr mode From: Johannes Berg <johannes@sipsolutions.net> To: John Linville <linville@tuxdriver.com> Cc: linux-wireless@vger.kernel.org, nbd@openwrt.org In-Reply-To: <20091118235737.696300447@sipsolutions.net> References: <20091118235627.209099206@sipsolutions.net> <20091118235737.696300447@sipsolutions.net> Content-Type: text/plain; charset="UTF-8" Date: Thu, 19 Nov 2009 11:55:19 +0100 Message-ID: <1258628119.7094.1.camel@johannes.local> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk

--- wireless-testing.orig/include/net/cfg80211.h 2009-11-19 11:15:52.000000000 +0100 +++ wireless-testing/include/net/cfg80211.h 2009-11-19 11:16:05.000000000 +0100 @@ -1134,6 +1134,9 @@ struct cfg80211_ops { * by default -- this flag will be set depending on the kernel's default * on wiphy_new(), but can be changed by the driver if it has a good * reason to override the default + * @WIPHY_FLAG_4ADDR_AP: supports 4addr mode even on AP (with a single station + * on a VLAN interface) + * @WIPHY_FLAG_4ADDR_STATION: supports 4addr mode even as a station */ enum wiphy_flags { WIPHY_FLAG_CUSTOM_REGULATORY = BIT(0), @@ -1141,6 +1144,8 @@ enum wiphy_flags { WIPHY_FLAG_DISABLE_BEACON_HINTS = BIT(2), WIPHY_FLAG_NETNS_OK = BIT(3), WIPHY_FLAG_PS_ON_BY_DEFAULT = BIT(4), + WIPHY_FLAG_4ADDR_AP = BIT(5), + WIPHY_FLAG_4ADDR_STATION = BIT(6), }; /** @@ -1366,6 +1371,10 @@ struct cfg80211_cached_keys; * @ssid_len: (private) Used by the internal configuration code * @wext: (private) Used by the internal wireless extensions compat code * @wext_bssid: (private) Used by the internal wireless extensions compat code + * @use_4addr: indicates 4addr mode is used on this interface, must be + * set by driver (if supported) on add_interface BEFORE registering the + * netdev and may otherwise be used by driver read-only, will be update + * by cfg80211 on change_interface */ struct wireless_dev { struct wiphy *wiphy; @@ -1379,6 +1388,8 @@ struct wireless_dev { struct work_struct cleanup_work; + bool use_4addr; + /* currently used for IBSS and SME - might be rearranged later */ u8 ssid[IEEE80211_MAX_SSID_LEN]; u8 ssid_len; --- wireless-testing.orig/net/wireless/nl80211.c 2009-11-19 11:15:52.000000000 +0100 +++ wireless-testing/net/wireless/nl80211.c 2009-11-19 11:54:24.000000000 +0100 @@ -968,6 +968,28 @@ static int parse_monitor_flags(struct nl return 0; } +static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev, + u8 use_4addr, enum nl80211_iftype iftype) +{ + if (!use_4addr) + return 0; + + switch (iftype) { + case NL80211_IFTYPE_AP_VLAN: + if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP) + return 0; + break; + case NL80211_IFTYPE_STATION: + if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION) + return 0; + break; + default: + break; + } + + return -EOPNOTSUPP; +} + static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev; @@ -1011,6 +1033,9 @@ static int nl80211_set_interface(struct if (info->attrs[NL80211_ATTR_4ADDR]) { params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]); change = true; + err = nl80211_valid_4addr(rdev, params.use_4addr, ntype); + if (err) + goto unlock; } else { params.use_4addr = -1; } @@ -1034,6 +1059,9 @@ static int nl80211_set_interface(struct else err = 0; + if (!err && params.use_4addr != -1) + dev->ieee80211_ptr->use_4addr = params.use_4addr; + unlock: dev_put(dev); cfg80211_unlock_rdev(rdev); @@ -1081,8 +1109,12 @@ static int nl80211_new_interface(struct params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]); } - if (info->attrs[NL80211_ATTR_4ADDR]) + if (info->attrs[NL80211_ATTR_4ADDR]) { params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]); + err = nl80211_valid_4addr(rdev, params.use_4addr, type); + if (err) + goto unlock; + } err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ? info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL, --- wireless-testing.orig/net/mac80211/main.c 2009-11-19 11:15:52.000000000 +0100 +++ wireless-testing/net/mac80211/main.c 2009-11-19 11:16:05.000000000 +0100 @@ -328,7 +328,9 @@ struct ieee80211_hw *ieee80211_alloc_hw( if (!wiphy) return NULL; - wiphy->flags |= WIPHY_FLAG_NETNS_OK; + wiphy->flags |= WIPHY_FLAG_NETNS_OK | + WIPHY_FLAG_4ADDR_AP | + WIPHY_FLAG_4ADDR_STATION; wiphy->privid = mac80211_wiphy_privid; /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */ --- wireless-testing.orig/net/mac80211/cfg.c 2009-11-19 11:04:52.000000000 +0100 +++ wireless-testing/net/mac80211/cfg.c 2009-11-19 11:16:05.000000000 +0100 @@ -42,15 +42,6 @@ static bool nl80211_params_check(enum nl if (!nl80211_type_check(type)) return false; - if (params->use_4addr > 0) { - switch(type) { - case NL80211_IFTYPE_AP_VLAN: - case NL80211_IFTYPE_STATION: - break; - default: - return false; - } - } return true; } @@ -107,12 +98,16 @@ static int ieee80211_change_iface(struct params->mesh_id_len, params->mesh_id); - if (params->use_4addr >= 0) - sdata->use_4addr = !!params->use_4addr; - if (sdata->vif.type != NL80211_IFTYPE_MONITOR || !flags) return 0; + if (type == NL80211_IFTYPE_AP_VLAN && + params && params->use_4addr == 0) + rcu_assign_pointer(sdata->u.vlan.sta, NULL); + else if (type == NL80211_IFTYPE_STATION && + params && params->use_4addr >= 0) + sdata->u.mgd.use_4addr = params->use_4addr; + sdata->u.mntr_flags = *flags; return 0; } @@ -827,7 +822,7 @@ static int ieee80211_change_station(stru return -EINVAL; } - if (vlansdata->use_4addr) { + if (params->vlan->ieee80211_ptr->use_4addr) { if (vlansdata->u.vlan.sta) return -EBUSY; --- wireless-testing.orig/net/mac80211/ieee80211_i.h 2009-11-19 11:04:52.000000000 +0100 +++ wireless-testing/net/mac80211/ieee80211_i.h 2009-11-19 11:16:05.000000000 +0100 @@ -312,6 +312,8 @@ struct ieee80211_if_managed { } mfp; /* management frame protection */ int wmm_last_param_set; + + u8 use_4addr; }; enum ieee80211_ibss_request { @@ -459,8 +461,6 @@ struct ieee80211_sub_if_data { int force_unicast_rateidx; /* forced TX rateidx for unicast frames */ int max_ratectrl_rateidx; /* max TX rateidx for rate control */ - bool use_4addr; /* use 4-address frames */ - union { struct ieee80211_if_ap ap; struct ieee80211_if_wds wds; --- wireless-testing.orig/net/mac80211/iface.c 2009-11-19 11:04:52.000000000 +0100 +++ wireless-testing/net/mac80211/iface.c 2009-11-19 11:16:05.000000000 +0100 @@ -752,7 +752,8 @@ int ieee80211_if_change_type(struct ieee ieee80211_mandatory_rates(sdata->local, sdata->local->hw.conf.channel->band); sdata->drop_unencrypted = 0; - sdata->use_4addr = 0; + if (type == NL80211_IFTYPE_STATION) + sdata->u.mgd.use_4addr = false; return 0; } @@ -815,6 +816,12 @@ int ieee80211_if_add(struct ieee80211_lo /* setup type-dependent data */ ieee80211_setup_sdata(sdata, type); + if (params) { + ndev->ieee80211_ptr->use_4addr = params->use_4addr; + if (type == NL80211_IFTYPE_STATION) + sdata->u.mgd.use_4addr = params->use_4addr; + } + ret = register_netdevice(ndev); if (ret) goto fail; @@ -825,9 +832,6 @@ int ieee80211_if_add(struct ieee80211_lo params->mesh_id_len, params->mesh_id); - if (params && params->use_4addr >= 0) - sdata->use_4addr = !!params->use_4addr; - mutex_lock(&local->iflist_mtx); list_add_tail_rcu(&sdata->list, &local->interfaces); mutex_unlock(&local->iflist_mtx); --- wireless-testing.orig/net/mac80211/rx.c 2009-11-19 11:04:52.000000000 +0100 +++ wireless-testing/net/mac80211/rx.c 2009-11-19 11:50:55.000000000 +0100 @@ -1192,10 +1192,13 @@ __ieee80211_data_to_8023(struct ieee8021 struct net_device *dev = sdata->dev; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data; - if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->use_4addr && - ieee80211_has_a4(hdr->frame_control)) + if (ieee80211_has_a4(hdr->frame_control) && + sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta) return -1; - if (sdata->use_4addr && is_multicast_ether_addr(hdr->addr1)) + + if (is_multicast_ether_addr(hdr->addr1) && + ((sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) || + (sdata->vif.type == NL80211_IFTYPE_STATION && sdata->u.mgd.use_4addr))) return -1; return ieee80211_data_to_8023(rx->skb, dev->dev_addr, sdata->vif.type); @@ -1245,7 +1248,8 @@ ieee80211_deliver_skb(struct ieee80211_r if ((sdata->vif.type == NL80211_IFTYPE_AP || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) && - (rx->flags & IEEE80211_RX_RA_MATCH) && !rx->sdata->use_4addr) { + (rx->flags & IEEE80211_RX_RA_MATCH) && + (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) { if (is_multicast_ether_addr(ehdr->h_dest)) { /* * send multicast frames both to higher layers in @@ -2007,7 +2011,7 @@ static int prepare_for_handlers(struct i switch (sdata->vif.type) { case NL80211_IFTYPE_STATION: - if (!bssid && !sdata->use_4addr) + if (!bssid && !sdata->u.mgd.use_4addr) return 0; if (!multicast && compare_ether_addr(sdata->dev->dev_addr, hdr->addr1) != 0) { --- wireless-testing.orig/net/mac80211/tx.c 2009-11-19 11:04:52.000000000 +0100 +++ wireless-testing/net/mac80211/tx.c 2009-11-19 11:16:05.000000000 +0100 @@ -1051,7 +1051,7 @@ ieee80211_tx_prepare(struct ieee80211_su hdr = (struct ieee80211_hdr *) skb->data; - if ((sdata->vif.type == NL80211_IFTYPE_AP_VLAN) && sdata->use_4addr) + if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) tx->sta = rcu_dereference(sdata->u.vlan.sta); if (!tx->sta) tx->sta = sta_info_get(local, hdr->addr1); @@ -1632,8 +1632,7 @@ netdev_tx_t ieee80211_subif_start_xmit(s switch (sdata->vif.type) { case NL80211_IFTYPE_AP_VLAN: rcu_read_lock(); - if (sdata->use_4addr) - sta = rcu_dereference(sdata->u.vlan.sta); + sta = rcu_dereference(sdata->u.vlan.sta); if (sta) { fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); /* RA TA DA SA */ @@ -1727,7 +1726,7 @@ netdev_tx_t ieee80211_subif_start_xmit(s #endif case NL80211_IFTYPE_STATION: memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN); - if (sdata->use_4addr && ethertype != ETH_P_PAE) { + if (sdata->u.mgd.use_4addr && ethertype != ETH_P_PAE) { fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); /* RA TA DA SA */ memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); --- wireless-testing.orig/net/wireless/util.c 2009-11-19 11:04:52.000000000 +0100 +++ wireless-testing/net/wireless/util.c 2009-11-19 11:54:24.000000000 +0100 @@ -659,6 +659,8 @@ int cfg80211_change_iface(struct cfg8021 return -EOPNOTSUPP; if (ntype != otype) { + dev->ieee80211_ptr->use_4addr = false; + switch (otype) { case NL80211_IFTYPE_ADHOC: cfg80211_leave_ibss(rdev, dev, false); @@ -682,5 +684,8 @@ int cfg80211_change_iface(struct cfg8021 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); + if (!err && params && params->use_4addr != -1) + dev->ieee80211_ptr->use_4addr = params->use_4addr; + return err; }

[2/3,v2] cfg80211: introduce capability for 4addr mode

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